Help!!! My cory keeps of floating!

[Fish enthusiastic]

I have resently bought a small leopard cory for my 20 gallon tank. I started to notice the cory floating to the surface of the water when is stops swimming, however, the cory didn't have any fin rot or bit marks. I keep the cory with 3 sanios, 3 red honey gourami, 2 pleco, 4 siamese algae eater, 2 khuli loaches, and 2 cories (including the sick one). The only chemicals i use are anti chlorine, good becteria, and plant fertilizer. The amonia leavel is low, and the ph was 7.5 to 7.8. If you know the treatment for this, please do tell me. I would really appreciate it.

 

[Oblio]

Welcome to TFF

Ammonia should be zero, I would do a large (75-80%) water change as soon as possible.

Do any of your fish have red gills?

 

[Rocky998]

I have resently bought a small leopard cory for my 20 gallon tank. I started to notice the cory floating to the surface of the water when is stops swimming, however, the cory didn't have any fin rot or bit marks. I keep the cory with 3 sanios, 3 red honey gourami, 2 pleco, 4 siamese algae eater, 2 khuli loaches, and 2 cories (including the sick one). The only chemicals i use are anti chlorine, good becteria, and plant fertilizer. The amonia leavel is low, and the ph was 7.5 to 7.8. If you know the treatment for this, please do tell me. I would really appreciate it.

Can you show any pictures? What test kit do you use? And what is "low" for ammonia, is it above 0?... I would also test for nitrites. This sounds like it could be swimbladder's disease if he is having a hard time staying at the bottom...

Siamease algae eaters in groups definitely need a larger tank and the males may get aggressive towards each other...

 

[Essjay]

I agree, can you post the actual numbers for ammonia, nitrite and nitrate, please. Ammonia and nitrite should be zero and nitrate below 20 ppm. Levels above these can stress fish, and stressed fish become sick more easily.


Siamese algae eaters, assuming you actually have these fish and not one of a number of similar species which are commonly mislabelled in stores, need a much bigger
For future reference, you have shoaling fish in groups which are too small - danios, kuhlis and cories all need a group of at least 6 with 10 or more of each species being better.
tank than 20 gallons, I'm afraid - at least 5 foot long.