One of my goldfish refuses to eat and lies on the bottom of the tank of its side. I’m not sure if it’s a disease or ammonia poisoning so I moved it to a temporary bucket in case it infected other fish. Can someone tell me what’s wrong?
I have a 10 gallon tank with four goldfish. My tank has been set up for 8 years, and only one of the original four has died so far. I don’t have any ammonia or nitrate test kits and I’m going on vacation today so I can’t get them.
Unfortunately, a 10 gallon is much too small for any goldfish. I suspect the reason for his problem is that the small tank has stunted him and compromised his swim bladder. He should have been about a foot long by 2 years old and he looks an awful lot smaller than that. You could try medicating with Esha 2000 in case he has an internal bacterial infection making matters worse, but really the most likely cause is stunting.
I don't know where you read that, but it's very wrong. The term "feeder" is used for the common goldfish in countries where feeding liv fish is allowed (it's illegal here). Nonetheless, if allowed to live instead of being fed to other fish they will grow to a foot long in a couple of years. If they are kept in a tank that is too small they will become stunted and susceptible to all kinds of problems with the swim bladder, internal organs and immune system.