I have 3 goldfish (3-4 years old) in a 30 gallon tank with a Fluval Aguaclear 50. One of my oldest fish (not a fancy) has been lethargic and bottom sitting for about a month. All day he hides in the corner and just sits on the bottom. Often he springs up when he hears the auto feeder or if we approach the side of the tank he is hiding. During the night he often comes out and sleeps floating in the middle portion of the tank. The other two fish (bigger bodied short tail) are very active and never sit on the bottom. Now this fish has always been the calmer of the three and never bottom sat in the past, however back in 2012 when they were in a 10 gallon with bad water and he bottom sat. Physically he looks ok with no visible abnormalities (only concern is big bubbles over eyes with haze, however they have been there for a long time). Water changes seem to have little to no effect. I started to add aquarium salt (.5 tsps per gal) which seemed to help slightly but I’m not sure. I do weekly ¼ tank changed and once a month do a ½ change. I always add beneficial bacterial to help he bio filter, and change filters monthly.
I really want to help him and I fear for his health. Part of me thinks my largest fish may be a bully and he is just hiding. I’m not sure what to do.
Last Test before change:
Ammonia .125
Nitrates 0
Nitrites 0
Ph 7.6ish
Temp: 76 Average
I really want to help him and I fear for his health. Part of me thinks my largest fish may be a bully and he is just hiding. I’m not sure what to do.
Last Test before change:
Ammonia .125
Nitrates 0
Nitrites 0
Ph 7.6ish
Temp: 76 Average