- Reaction score
- 3 years
My fancy goldfish is having trouble swimming. He's been in my 29 gallon tank for about 4 months now. A couple months ago, he started losing scales. He was still acting normal, so I thought nothing of it. Last night, he kept listing to the side and sinking to the bottom of the tank. I did a test on the water and found that the nitrates were in the "Dangerous" level, so I did a 25% water change. The tank has been up for about 3 years now and I never had an issue with water quality. The tank is not overstocked in any way. I have 4 white cloud minnows, 4 corydora cats, and 2 goldfish. Anyway, back to the fish. All he does now is rest on the leaves of my plastic plant, and only occasionally gets up to swim.