Emerald green cory care guide

Emerald cory tank size

Plan your setup around a base tank length of 120 cm and a width of 45 cm, as recommended by Seriously Fish. These armoured catfish come from tributaries, backwaters, oxbows and marginal lakes throughout the Amazon basin in Brazil, Peru, Ecuador and Colombia. Juveniles develop mottled skin and a tall dorsal fin, which is a natural stage of growth rather than a distinct colour variety.Plan your setup around a base tank length of about 4 ft (47 in) and a width of 18 in, as recommended by Seriously Fish. These armoured catfish come from tributaries, backwaters, oxbows and marginal lakes throughout the Amazon basin in Brazil, Peru, Ecuador and Colombia. Juveniles develop mottled skin and a tall dorsal fin, which is a natural stage of growth rather than a distinct colour variety.^[1]

Select fine sand or clean rounded gravel for the aquarium floor. Seriously Fish accepts rounded gravel as long as you keep it scrupulously clean. Provide some physical cover to give your catfish shelter, while treating additional hardscape or decorations as largely optional.Select fine sand or clean rounded gravel for the aquarium floor. Seriously Fish accepts rounded gravel as long as you keep it scrupulously clean. Provide some physical cover to give your catfish shelter, while treating additional hardscape or decorations as largely optional.^[1]

• 5 gal
• 10 gal
• 54 L
• 60 L
• 20 gal high
• 20 gal long
• 29 gal
• 112 L
• 40 gal breeder
• 180 L
• 55 gal
• 75 gal
• 240 L

Emerald cory water parameters

Maintain water temperatures between 22–28 °C, a pH of 5.8–8.0 and general hardness between 5–15 dGH. Seriously Fish states a broader natural tolerance of 20–28 °C, pH 5.0–8.0 and 2–15 dGH, but aiming for the shared overlap provides stable living conditions.Maintain water temperatures between 72–82 °F, a pH of 5.8–8.0 and general hardness between 5–15 dGH. Seriously Fish states a broader natural tolerance of 68–82 °F, pH 5.0–8.0 and 2–15 dGH, but aiming for the shared overlap provides stable living conditions.^[1]

Establish biological filtration completely before you introduce any catfish. Nitrification must keep ammonia undetectable and nitrite controlled, because visually clear water does not confirm chemical safety. Test ammonia weekly and whenever you see behavioural changes, making sure to avoid overfeeding.Establish biological filtration completely before you introduce any catfish. Nitrification must keep ammonia undetectable and nitrite controlled, because visually clear water does not confirm chemical safety. Test ammonia weekly and whenever you see behavioural changes, making sure to avoid overfeeding.^[3]

Feeding emerald cories

Emerald corys are foraging omnivores that eat sinking dry foods alongside small live or frozen items like bloodworm and Tubifex. Do not expect them to survive on leftovers or act as aquarium cleaners. Provide a varied selection to meet their nutritional needs.Emerald corys are foraging omnivores that eat sinking dry foods alongside small live or frozen items like bloodworm and Tubifex. Do not expect them to survive on leftovers or act as aquarium cleaners. Provide a varied selection to meet their nutritional needs.^[1]

Follow general RSPCA feeding guidance by offering two small meals daily, limiting each portion to what your fish consume in about two minutes. Adjust the exact amount to your stocking level and remove uneaten food so decomposing waste does not spoil water quality.Follow general RSPCA feeding guidance by offering two small meals daily, limiting each portion to what your fish consume in about two minutes. Adjust the exact amount to your stocking level and remove uneaten food so decomposing waste does not spoil water quality.^[2]

Emerald cory behaviour

These catfish are peaceful and gregarious bottom-dwellers. Keep a minimum group of six or more fish together, though Seriously Fish suggests maintaining six to eight individuals.These catfish are peaceful and gregarious bottom-dwellers. Keep a minimum group of six or more fish together, though Seriously Fish suggests maintaining six to eight individuals.^[1]

You will occasionally see these catfish dash to the surface to gulp atmospheric air. They possess a modified vascular intestine for facultative air-breathing. Occasional surface breathing is normal captive behaviour, so surface trips alone do not confirm illness.You will occasionally see these catfish dash to the surface to gulp atmospheric air. They possess a modified vascular intestine for facultative air-breathing. Occasional surface breathing is normal captive behaviour, so surface trips alone do not confirm illness.^[1][3][5]

Emerald cory tank mates

Neon tetrasNeon tetras, , glowlight tetrasglowlight tetras and and harlequin rasborasharlequin rasboras make suitable midwater companions. These peaceful shoaling species work well alongside catfish provided their shared temperature and hardness requirements match and your tank supplies ample swimming space for full schools of every species. make suitable midwater companions. These peaceful shoaling species work well alongside catfish provided their shared temperature and hardness requirements match and your tank supplies ample swimming space for full schools of every species.^{[9][1][10][11]}

Honey gouramisHoney gouramis can also share a community tank, but require extra attention. They are slow-moving fish vulnerable to feeding competition and intimidation. Verify that your water parameters overlap and verify that food reaches both species during daily feedings. can also share a community tank, but require extra attention. They are slow-moving fish vulnerable to feeding competition and intimidation. Verify that your water parameters overlap and verify that food reaches both species during daily feedings.^[12][1]

Avoid housing emerald corys with large predators like Avoid housing emerald corys with large predators like OscarsOscars or aggressive or aggressive Jack DempseysJack Dempseys, which can swallow or attack smaller tank mates as they mature. You must also avoid , which can swallow or attack smaller tank mates as they mature. You must also avoid Pea puffersPea puffers, which carry a documented risk of nipping slower tank companions., which carry a documented risk of nipping slower tank companions.^[1][6][7][8]

Emerald cory health problems

Ammonia poisoning occurs when fish waste or uneaten food accumulates and overwhelms the biological filter. Prevent toxicity by cycling filters fully before stocking and testing weekly.Ammonia poisoning occurs when fish waste or uneaten food accumulates and overwhelms the biological filter. Prevent toxicity by cycling filters fully before stocking and testing weekly.^[3]

Ich is a contagious protozoan infection affecting freshwater fish. Warning signs include tiny white grains on the fins or skin, rubbing against hard surfaces, excess mucus and reduced feeding. Reduce transmission risks by quarantining new arrivals for at least 30 days with dedicated nets.Ich is a contagious protozoan infection affecting freshwater fish. Warning signs include tiny white grains on the fins or skin, rubbing against hard surfaces, excess mucus and reduced feeding. Reduce transmission risks by quarantining new arrivals for at least 30 days with dedicated nets.^[5]

Poor water parameters and physical stress make fish vulnerable to infection. Keep water scrupulously clean and protect your catfish from physical injury, seeking an accurate diagnosis if damage appears.Poor water parameters and physical stress make fish vulnerable to infection. Keep water scrupulously clean and protect your catfish from physical injury, seeking an accurate diagnosis if damage appears.^[4]

Male or female?

Telling sexes apart is only practical once the fish reach maturity. Adult female emerald corys develop a visibly rounder, higher-bodied outline and grow slightly larger than adult males. Reliable sex identification is not possible in young fish.Telling sexes apart is only practical once the fish reach maturity. Adult female emerald corys develop a visibly rounder, higher-bodied outline and grow slightly larger than adult males. Reliable sex identification is not possible in young fish.^[1]

Questions