NAGARAJAN'S WEBPAGE FOR BEGINNER'S TROPICAL FISH AQUARIUM Emerald catfish
Common NameEmerald Catfish
Species/genusBrochis multiradiatus
Keeping At first look it appears to be a cory species, but this is not a cory buy a different genus. Look at the dorsal fin and the ray count is different and is broader. Classified as a scavenger, these will clean up excess food, up to a point. But they are not garbage disposal agents and won't eat fish wastes or old rotten food, and they are not a substitute for proper aquarium maintenance. These are very peaceful fishes and need to be kept in groups of at least 4. Good beginners fish. They have a nice bronze/green body coloration and when caught in the wild the colours stand out magnificently and you can see why their common name is the “Emerald Catfish” but they do fade slightly when brought home. Ensure that these bottom feeders are not depirved of their due share of pellet food and live foods. They need good water conditions and also plenty of plants and hiding place. Do not keep sharp bottom materials as they can injure their barbels.
Breeding Very difficult to breed in a aquarium, but normal cory breeding techniques can be tried. Use a pH of 6.5 and temperature 26°C. Also try raising the temperature of the tank to 28°C for a few days and then lowering the temperature back to 26°C, changing 25% of the water. Pairs remain loyal. These catfish can spawn many times per year. These catfish do not pratice brood care. They attach their eggs to plants, rocks or even the glass walls of the tank. You can remove them and place them in a separate rearing tank. When the fry have used up their yolk sac, they can be fed newly hatched Brine shrimp or crushed flake food. As with all fish, water quality must be maintained to get good results. People have also reported success by putting many pairs in together to breed. Some have used strong aeration to induce the cory's to breed. You can try all.

It's best to separate the breeding pair cause they are usually quite helpless in protecting the eggs, unlike cichlids. Spread some sand at the base of tank, add in leafy plants (e.g. amazon sword) and cover half the water surface with floating/loose plants. These helps to calm the pair. Use fresh water, maintain at 24 degrees Celsius and keep the level low, not exceeding 20 cm. When they spawn, the female sucks the male's vent and retains the sperm in her mouth. Then she will blow the sperm out to fertilize the eggs that's held under her pelvic fins, and place them in selected spots. Eggs normally hatch in 3 to 5 days and brine shrimp should be prepared. Important to keep water clean. Add a few drops of methylene blue to the tank having eggs to avoid fungus attack and also keep light aeration and water circulation.

Fry are big in size and can take freshly hatched brine shrimps and they grow fast and can take other powdered flakes and worms soon. Keep water shallow in the fry tank so that it is easy for fry to get air from the atmosphere.

Origin TempWaterTemper SizeTankFoodBreeding
S.America65-80 °FNeutral to Soft Peaceful, Community2-3 inch5 Gallon All, WormsEgg Layer, Not easy

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