7 Tips for Maintaining a Bronze Corydoras Tank

Caring for a Bronze Corydoras tank can be both relaxing and rewarding. These small, peaceful fish add charm to any freshwater aquarium, but maintaining their environment requires attention to water quality, diet, and habitat setup for optimal health.

Proper maintenance of a Bronze Corydoras tank involves consistent water testing, regular cleaning, balanced feeding, and monitoring for signs of stress or disease. Ensuring appropriate substrate, hiding spots, and tank mates contributes to a stable and healthy aquatic environment.

Following these guidelines will help your Bronze Corydoras thrive and maintain their natural behavior, creating a vibrant and balanced aquarium ecosystem for years.

Choosing the Right Tank Size

A Bronze Corydoras thrives best in a spacious tank that allows free swimming and exploration. A minimum of 20 gallons is recommended for a small group, though larger tanks provide more stability and reduce stress. These fish prefer to be in groups of at least six, so planning space accordingly is essential. Substrate choice is also critical; fine sand or smooth gravel protects their delicate barbels and encourages natural foraging. Avoid sharp or rough materials that could injure them. Including hiding spots such as plants, driftwood, and small caves offers comfort and security. Maintaining stable water conditions is easier in larger volumes. Temperature should be kept between 72–78°F, and pH should stay around neutral. Regular monitoring of ammonia, nitrite, and nitrate levels ensures a healthy environment. Adequate filtration with gentle flow supports their peaceful nature, while occasional water changes maintain overall tank cleanliness without causing sudden shifts in chemistry or temperature.

A well-sized tank reduces stress and promotes natural behavior, helping Bronze Corydoras grow healthy and active.

Providing proper space and substrate ensures your fish remain comfortable, healthy, and display their natural curiosity and social interactions consistently.

Maintaining Water Quality

Regular water testing is crucial for Bronze Corydoras health, as they are sensitive to changes in ammonia, nitrite, and nitrate levels.

Frequent water changes and careful monitoring prevent toxic buildup. Using a reliable test kit helps maintain consistent parameters, and removing uneaten food reduces contamination. Filtration should be adequate but not create strong currents, as these fish prefer gentle water flow. Consistency in temperature and pH is important, as sudden fluctuations can stress them and increase susceptibility to disease. Keeping the tank clean includes vacuuming the substrate carefully to avoid disturbing their habitat, while plants and decorations should be rinsed periodically to remove debris. Observing your fish daily can help identify subtle changes in behavior, which often indicate water issues before they become severe. Avoid overcrowding, as this leads to rapid deterioration of water quality and increased competition for food. Maintaining balance in the ecosystem, with careful feeding, plant care, and monitoring, supports a long and healthy life for your Bronze Corydoras, keeping them active and displaying natural behaviors in a stable, safe environment.

Feeding and Nutrition

Bronze Corydoras need a varied diet to stay healthy. High-quality sinking pellets, frozen foods, and occasional live treats support growth and vitality. Avoid overfeeding to maintain water quality.

A balanced diet helps prevent malnutrition and ensures vibrant colors and active behavior. Sinking pellets reach the bottom where these bottom-dwellers feed naturally. Supplementing with bloodworms, brine shrimp, or daphnia provides protein and encourages natural foraging instincts. Feeding small portions multiple times a day mimics natural feeding patterns and reduces uneaten food, which can pollute the tank. Vegetables like blanched zucchini or cucumber add fiber and variety, contributing to overall digestive health. Maintaining consistency in feeding routines fosters healthy growth, strengthens immunity, and reduces stress.

Monitoring your Corydoras during feeding ensures each fish gets access to food. Observing their eating habits helps detect potential health issues early. Rotating food types prevents dietary boredom and promotes long-term wellness, while adjusting portions based on group size avoids water contamination and keeps your tank environment stable.

Tank Decorations and Hiding Spots

Providing hiding spots reduces stress and encourages natural behavior. Plants, caves, and driftwood give security and comfort.

Dense vegetation and smooth decorations create shelter and mimic their natural environment. Corydoras feel safer when they have multiple hiding areas, which helps reduce aggression and promotes social interaction. Decorations should avoid sharp edges to prevent injury to their delicate barbels. Using live plants not only provides cover but also helps maintain water quality by absorbing nitrates and providing oxygen. Arranging driftwood or rocks thoughtfully creates crevices for exploration, while maintaining open swimming areas allows them to move freely. Regularly cleaning decorations prevents algae buildup and keeps hiding spots inviting. Observing how your fish interact with these areas helps identify which spots they prefer and ensures everyone has access. Strategically placing shelters in multiple locations balances tank space and supports a peaceful community environment.

Hiding spots also play a role in breeding behavior, as Corydoras seek protected areas for laying eggs. A combination of live plants, smooth rocks, and driftwood creates a natural, stress-free habitat. Ensuring some open space between decorations allows for swimming and foraging, while multiple shelters prevent territorial disputes. Periodic rearrangement can stimulate exploration, keeping the fish active and engaged. This setup encourages natural social behavior, reduces stress, and contributes to their overall health and longevity. Regular observation and maintenance ensure that the tank remains both functional and aesthetically pleasing.

Tank Mates

Bronze Corydoras are peaceful and do well with other non-aggressive fish. Avoid large, predatory species that may stress or harm them.

Small community fish like tetras, rasboras, and guppies complement their calm nature. Ensure all tank mates share similar water requirements to maintain harmony.

Substrate Selection

Fine sand or smooth gravel is ideal for Bronze Corydoras. Sharp or coarse materials can damage their sensitive barbels, leading to stress and infections. Smooth substrates allow natural foraging and digging behavior, which keeps them active and engaged. Regular cleaning prevents buildup of waste and debris, maintaining overall tank hygiene and a safe environment.

Water Temperature

Maintaining a stable water temperature between 72–78°F supports their metabolism and immune system. Sudden fluctuations can cause stress or illness, so using a reliable heater and monitoring daily is essential for a healthy, thriving tank.

FAQ

How often should I feed my Bronze Corydoras?
Feeding small portions two to three times a day works best. Use sinking pellets as the staple diet and supplement with frozen or live foods occasionally. Avoid overfeeding, as leftover food can pollute the tank and harm water quality. Observing their eating habits ensures every fish gets enough nutrition.

Can Bronze Corydoras live with other fish?
Yes, they thrive in a peaceful community tank. Ideal tank mates include small tetras, rasboras, guppies, and other non-aggressive species. Avoid large or territorial fish that may stress or injure them. Proper planning ensures a calm, balanced environment where all species coexist.

What substrate is best for their tank?
Fine sand or smooth gravel is recommended. Corydoras use their barbels to forage, and rough or sharp substrates can cause injury. Sand allows natural digging behavior and is easy to clean. Regular siphoning prevents debris buildup while keeping the bottom safe and comfortable.

How important are hiding spots?
Hiding spots are essential for reducing stress and encouraging natural behavior. Include plants, driftwood, and caves so fish can retreat when needed. Multiple hiding areas prevent territorial disputes and create a more comfortable environment, which supports social interaction and overall health.

How often should I change the water?
Weekly water changes of 20–30% maintain water quality and stability. Monitor ammonia, nitrite, and nitrate levels to ensure a safe environment. Consistent water changes prevent toxic buildup and help fish remain healthy, active, and vibrant over time.

What water temperature should I maintain?
Keep the water between 72–78°F. Bronze Corydoras are sensitive to sudden temperature changes, which can stress them and weaken their immune system. Use a reliable heater, monitor daily, and avoid placing the tank in drafty areas or near direct sunlight.

Can Bronze Corydoras breed in a home tank?
Yes, breeding is possible with proper conditions. Provide clean water, adequate hiding spots, and a balanced diet. Slightly cooler water changes can trigger spawning behavior. They often lay eggs on plant leaves or smooth surfaces, and separating eggs from adults improves survival rates.

How do I tell if my fish are stressed or sick?
Watch for changes in behavior, such as hiding excessively, reduced movement, or loss of appetite. Physical signs include clamped fins, discoloration, or frayed barbels. Early detection allows for timely intervention, which may involve water adjustments, quarantine, or targeted treatment.

Is it necessary to use a filter?
Yes, a filter ensures proper water circulation and removes toxins. Use a gentle flow filter to avoid stressing Corydoras. Regular cleaning of the filter media maintains efficiency without disturbing the tank’s balance, promoting a safe and healthy environment for all inhabitants.

Can I keep plants in their tank?
Live plants are highly recommended. They provide hiding spots, improve water quality by absorbing nitrates, and create a natural environment. Smooth-leaved plants prevent injury to barbels. Combining plants with driftwood and rocks encourages exploration and mimics their natural habitat, benefiting their overall health.

How many Corydoras should I keep together?
Keep at least six together. They are social fish and feel more secure in groups. Small groups may lead to stress or shy behavior. A larger group encourages natural schooling behavior, reduces aggression, and promotes activity throughout the tank.

What should I do if my Corydoras stops eating?
Check water parameters first. Poor water quality or sudden changes often cause appetite loss. Examine for signs of illness or stress. Offering variety in diet, such as live or frozen foods, can stimulate feeding. Adjusting tank conditions promptly helps restore their health and appetite.

Are Bronze Corydoras sensitive to medications?
Yes, they are more delicate than some other species. Always follow dosage instructions carefully and consider isolating the fish if treatment is necessary. Monitor their behavior and environment closely during treatment to prevent stress or injury.

Can they live in cold water?
No, they prefer stable tropical temperatures. Water below 70°F can stress them and weaken their immune system. Maintaining proper temperature is essential for their long-term health, growth, and active behavior.

How long do Bronze Corydoras typically live?
With proper care, they can live up to 5 years or more. Maintaining water quality, diet, tank size, and a calm environment directly impacts their lifespan. Regular observation ensures early detection of potential issues, promoting longevity and overall well-being.

What signs indicate tank overcrowding?
Signs include increased aggression, hiding, competition for food, and deteriorating water quality. Overcrowding stresses the fish and can lead to illness or stunted growth. Maintaining proper stocking levels based on tank size ensures a peaceful, healthy, and balanced environment.

How do I clean the tank without stressing the fish?
Perform partial water changes, siphon the substrate gently, and avoid sudden temperature or chemical changes. Clean decorations gradually and maintain consistency in routine. This approach preserves water stability while keeping fish comfortable and minimizing stress.

Can I use tap water directly?
No, tap water must be treated to remove chlorine and chloramines. Using a water conditioner makes it safe for fish. Testing parameters after changes ensures water remains stable and supports the health of Bronze Corydoras consistently.

Do Corydoras need a lid on the tank?
Yes, they are active swimmers and can jump. A secure lid prevents escapes while maintaining proper humidity and temperature stability. This simple precaution reduces stress and protects them from accidental injury.

How do I acclimate new Corydoras to my tank?
Float the bag in the tank to equalize temperature, then gradually mix tank water over 30–60 minutes. Slowly releasing them reduces stress and prevents shock. Observing behavior during the first few hours ensures they adjust comfortably to the new environment.

What is the best lighting for their tank?
Moderate lighting is sufficient. Bright lights may stress them if there are no shaded areas. Live plants benefit from natural or aquarium-specific lighting. Balance lighting duration to encourage natural activity without disturbing their rest periods.

Are Bronze Corydoras nocturnal?
They are primarily active during the day but remain more active in low light. Providing shaded areas and hiding spots allows them to rest and explore safely, supporting natural behavior patterns and overall well-being.

How do I prevent fin damage or injuries?
Use smooth substrates, avoid sharp decorations, and choose peaceful tank mates. Regular monitoring ensures that any signs of injury are addressed early, maintaining the integrity of their fins and barbels.

Can I keep different Corydoras species together?
Yes, most species are compatible if they share similar water requirements and temperament. Monitor interactions to ensure harmony. Providing enough space and hiding spots minimizes territorial disputes and encourages peaceful cohabitation.

Do they require a specific water pH?
A neutral pH around 6.5–7.5 is ideal. Sudden changes in pH can stress Corydoras, making them more susceptible to illness. Regular testing and gentle adjustments keep the tank stable and fish healthy.

How do I encourage breeding behavior?
Maintain clean water, provide hiding spots, and offer high-protein foods. Slightly cooler water changes can trigger spawning. Eggs are usually laid on plant leaves or smooth surfaces. Separating eggs from adults increases survival rates and supports successful breeding.

Can they tolerate fluctuations in tank conditions?
No, stability is key. Bronze Corydoras are sensitive to temperature, pH, and water chemistry changes. Consistent maintenance, monitoring, and gentle adjustments are necessary to keep them healthy and active.

How do I know if my fish are happy?
Active swimming, natural foraging, clear coloration, and social interaction with their group indicate well-being. Stress or illness often shows as lethargy, hiding, or loss of appetite, signaling that attention to tank conditions or care routines is needed.

Is tank lighting necessary for plant growth only?
Primarily, yes. Plants need moderate lighting to thrive. Corydoras benefit indirectly, as healthy plants provide hiding spots, improve water quality, and create a natural environment, supporting comfort and reducing stress.

How do I manage algae growth?
Regular water changes, controlling light duration, and cleaning decorations help prevent excessive algae. Live plants compete with algae for nutrients, reducing growth. Maintaining balance in feeding and tank care minimizes algae without harming the fish.

Can I transport Bronze Corydoras safely?
Use a sturdy bag with water from the current tank, keep it insulated, and minimize movement. Avoid temperature shocks and ensure adequate oxygen. Gentle handling during transport reduces stress and prevents injury.

What is the best method for quarantine?
A separate tank with clean water, gentle filtration, and monitored parameters is ideal. Quarantine new fish for 2–4 weeks to detect disease, prevent spreading parasites, and ensure they are healthy before adding them to the main tank.

How often should I observe my fish?
Daily observation is recommended. Watch for changes in behavior, appetite, or appearance. Early detection of illness, stress, or water issues allows prompt action, maintaining a healthy environment and supporting their long-term well-being.

Are Corydoras sensitive to medications?
Yes, always follow dosage instructions carefully. Use gentle treatments and isolate affected fish if possible. Monitor water parameters closely during treatment to reduce stress and prevent negative reactions.

How do I prevent stress in my tank?
Stable water conditions, peaceful tank mates, proper hiding spots, and consistent feeding routines all reduce stress. Avoid overcrowding and sudden changes. Observing behavior ensures timely adjustments to maintain a calm, healthy environment for your fish.

Can Corydoras jump out of the tank?
Yes, they are active swimmers and may jump. A secure lid prevents accidents while maintaining temperature and humidity stability, ensuring their safety.

How do I handle sudden deaths in the tank?
Remove the fish promptly, test water quality, and examine for signs of disease. Investigate tank conditions, diet, and behavior of remaining fish. Taking corrective measures prevents further loss and maintains a stable, healthy environment.

Is it necessary to provide supplemental oxygen?
Not usually, if the tank is well-aerated through filtration and plants. However, ensure sufficient surface agitation and monitor during hot or overcrowded conditions to maintain oxygen levels for all fish.

How do I safely introduce new decorations?
Rinse and inspect new items to remove chemicals or sharp edges. Arrange them gradually, allowing fish to adjust. Clean regularly to maintain a safe, comfortable habitat without causing stress or injury.

Can Bronze Corydoras tolerate brackish water?
No, they require freshwater. Even small amounts of salt can cause stress, weaken immunity, and damage sensitive tissues. Maintaining consistent freshwater conditions ensures long-term health and comfort.

What are common signs of poor water quality?
Cloudy water, strong odor, algae overgrowth, and unhealthy fish behavior indicate water issues. Regular testing and maintenance prevent deterioration and protect your Bronze Corydoras from stress and disease.

How do I maintain social harmony in the tank?
Keep groups of at least six, provide multiple hiding spots, and avoid aggressive species. Balanced feeding and adequate space reduce stress and encourage natural schooling and social behavior.

Are Copper or Zinc-based treatments safe?
No, these metals are toxic to Corydoras. Avoid medications containing copper or zinc. Always check labels and use fish-safe alternatives to treat illnesses without harming sensitive species.

How can I prevent barbels from injury?
Use smooth substrates, avoid sharp decorations, and monitor interactions with tank mates. Maintaining clean substrate reduces debris-related damage and promotes healthy foraging behavior.

Do Corydoras need supplemental calcium or minerals?
No specific supplementation is required if water parameters are stable and a balanced diet is provided. Healthy water and varied food naturally supply necessary nutrients for growth and vitality.

How do I encourage natural foraging behavior?
Scatter sinking pellets, offer occasional live or frozen foods, and provide fine sand for digging. Allowing them to explore the bottom keeps them active and engaged, mimicking natural habits.

Can Corydoras live alone?
They prefer groups. Keeping a single fish can lead to stress, hiding, and reduced activity. Social interaction is important for mental and physical health, so maintaining a group ensures proper behavior and well-being.

How do I prevent disease outbreaks?
Maintain stable water parameters, avoid overfeeding, quarantine new fish, and provide hiding spots. Regular observation and prompt treatment of illness minimize risk and keep the tank environment healthy.

Are Corydoras sensitive to light cycles?
Moderate lighting supports activity while shaded areas allow rest. Sudden changes or excessively bright light may stress them. Consistent light cycles help regulate natural behavior and maintain comfort.

Can I use aquarium salt safely?
Only in small amounts for specific treatments, and never as a routine additive. Excess salt can harm Corydoras by affecting sensitive skin and barbels. Follow species-specific guidelines to ensure safety.

How long should I monitor new fish after introduction?
Observe daily for at least two weeks. Watch for stress, aggression, or signs of disease. Early detection allows corrective action and protects the health of both new and existing fish.

Is it necessary to have a quarantine tank?
Yes, a quarantine tank prevents disease spread and allows close monitoring of new fish. Using a separate, controlled environment ensures the main tank remains healthy and balanced.

How do I prevent stress during maintenance?
Perform gradual water changes, clean gently, and avoid abrupt temperature or chemical changes. Maintaining routine procedures reduces stress and keeps fish comfortable while ensuring a clean, safe tank.

Can Corydoras adapt to different water hardness?
They tolerate a moderate range but prefer softer, neutral water. Sudden shifts in hardness can cause stress or health issues. Gradual adjustments help them acclimate without negative effects.

What are signs of aging in Bronze Corydoras?
Slower swimming, duller coloration, and reduced activity indicate aging. Maintaining good care, proper diet, and stable water quality supports their health and comfort even as they grow older.

How do I prevent overgrowth of plants?
Regular trimming, controlled lighting, and careful fertilization keep plant growth balanced. Healthy plant maintenance ensures hiding spots remain accessible without overcrowding the tank or restricting swimming areas.

Can Corydoras tolerate tap water directly?
No, always treat tap water to remove chlorine and chloramines. Conditioned water maintains safe chemical levels, preventing stress and injury to delicate barbels and skin.

How do I maintain proper tank circulation?
Use gentle filtration and avoid strong currents. Adequate water movement supports oxygenation, disperses nutrients, and maintains consistent parameters without stressing the fish.

Are Corydoras nocturnal feeders?
They are primarily active during the day but often forage more in dim light. Offering food during low-light periods supports natural behavior and encourages active foraging without stress.

How often should I clean decorations?
Clean decorations periodically to remove algae and debris. Avoid harsh chemicals. Routine maintenance maintains a safe environment, reduces stress, and preserves hiding spots and natural behavior.

Can I keep multiple Corydoras species together?
Yes, if water parameters, temperament, and tank size are compatible. Observe interactions to ensure harmony and provide enough hiding spots to reduce territorial disputes.

What signs indicate overfeeding?
Cloudy water, uneaten food, and increased algae suggest overfeeding. Adjust portion sizes, monitor eating habits, and remove excess food to maintain water quality and fish health.

How do I treat minor injuries?
Isolate affected fish if possible, maintain clean water, and consider gentle antiseptic treatments suitable for freshwater species. Monitor recovery and prevent infection by ensuring a stable, low-stress environment.

Can I keep Corydoras in a planted tank?
Yes, they thrive in planted tanks. Plants provide shelter, improve water quality, and encourage natural foraging. Choose smooth-leaved species to protect barbels and maintain a balanced, comfortable environment.

How do I prevent aggression?
Keep groups of at least six, provide hiding spots, and avoid aggressive tank mates. Proper feeding and adequate space reduce stress and encourage peaceful interactions.

Are Corydoras sensitive to chemicals?
Yes, avoid harsh cleaners, medications with copper, and untreated tap water. Maintaining safe water conditions supports their health, comfort, and longevity.

How do I handle sick fish?
Quarantine, maintain clean water, and treat with species-safe medications. Monitor behavior and water parameters closely. Prompt intervention prevents disease spread and supports recovery.

Can they live with shrimp or snails?
Yes, peaceful invertebrates are generally safe tank mates. Monitor interactions to prevent accidental harm, and provide hiding spots for all species to coexist comfortably.

How do I prevent fin rot?
Maintain water quality, avoid overcrowding, and provide hiding spots. Promptly address injuries or stress. Balanced care and consistent monitoring reduce the risk of infection and promote healing.

What is the ideal group size?
At least six. Small groups can cause stress and hiding behavior. Larger groups encourage schooling, activity, and natural social interaction.

Do Corydoras need aeration?
Not if filtration provides adequate surface movement. Supplemental air may be helpful in crowded or warm tanks to maintain oxygen levels.

How do I acclimate new tank mates?
Float bags for temperature adjustment, then gradually mix tank water over 30–60 minutes. Slow introduction reduces stress and supports smooth integration.

Can they tolerate low light conditions?
Yes, moderate to dim lighting suits them. They explore more in low light and feel safer, while shaded areas reduce stress and support natural behavior.

How do I prevent overcrowding?
Calculate stocking levels based on tank size and fish size. Provide hiding spots and adequate swimming space. Maintaining proper population ensures health, reduces stress, and promotes harmony.

Are Corydoras sensitive to pH changes?
Yes, rapid shifts can cause stress or illness. Maintain neutral to slightly acidic or slightly alkaline water and adjust gradually if needed.

How do I know if my fish are comfortable?
Active swimming, natural foraging, and interaction with their group indicate comfort. Hiding occasionally is normal, but excessive hiding or lethargy suggests stress or health issues.

Can I use tap water conditioners safely?
Yes, use reputable products to remove chlorine and chloramines. Proper treatment ensures water is safe, supporting their health and reducing stress on delicate barbels and skin.

What is the ideal tank layout?
Open swimming areas, multiple hiding spots, smooth substrate, and plants create a balanced environment. Proper arrangement reduces stress, encourages activity, and supports natural behavior.

How do I monitor water quality?
Use test kits for ammonia, nitrite, nitrate, pH, and temperature. Regular monitoring allows timely adjustments, maintaining a healthy environment and preventing stress or illness.

Can Corydoras survive sudden changes in diet?
They can adapt gradually. Sudden changes may cause stress or digestive issues. Slowly introduce new foods while maintaining staples to ensure a balanced diet and overall health.

Do they require special supplements?
Not if diet is

Final Thoughts

Maintaining a Bronze Corydoras tank requires consistency, patience, and attention to detail. These small fish are peaceful and social, thriving when their environment is stable and supportive. Proper water quality, temperature, and pH are essential to their health, as they are sensitive to sudden changes. Regular water testing, partial water changes, and gentle cleaning help prevent toxins from accumulating in the tank. Choosing an appropriate tank size, ideally 20 gallons or more, provides space for swimming and reduces stress. A well-planned layout with hiding spots, smooth substrates, and open swimming areas encourages natural behaviors and keeps the fish active and comfortable. Careful attention to water parameters and tank setup forms the foundation for long-term health and well-being.

Nutrition plays a significant role in their vitality. A balanced diet of sinking pellets, supplemented with live or frozen foods, ensures proper growth and supports immune function. Feeding small amounts multiple times a day mirrors their natural foraging behavior and reduces waste buildup in the tank. Including occasional vegetable matter adds fiber and variety, promoting digestive health. Overfeeding should be avoided, as leftover food can quickly deteriorate water quality. Observing the fish during feeding provides insight into their well-being and allows early detection of potential health issues. Maintaining social groups of six or more reduces stress and encourages natural schooling behavior, contributing to a harmonious tank environment. Tank mates should be peaceful and share similar water requirements, ensuring compatibility and minimizing conflicts.

Regular monitoring and observation are key to preventing and addressing problems early. Watching for changes in behavior, appetite, or appearance helps identify stress or illness before it becomes severe. Substrate, decorations, and plants should be chosen and maintained with their safety in mind, avoiding sharp edges or overcrowding. A stable lighting schedule and appropriate temperature support comfort and activity levels. Planning for acclimation when introducing new fish, maintaining proper filtration, and providing secure hiding spaces all contribute to a healthy, thriving aquarium. By following these guidelines and paying attention to the daily needs of Bronze Corydoras, you can create a peaceful, balanced, and sustainable tank. Consistent care, thoughtful planning, and attentiveness to both environmental and dietary needs help ensure that your Corydoras live long, healthy, and active lives, displaying natural behaviors and enhancing the overall appeal of your freshwater aquarium.