My Oranda (who is 1/2 th size of the other 2) again is lying on the bottom of the tank. He is about
Following advice and believing that it was a water quality problem, I moved the 3 to a 55 gallon tank. The problem was intermittent with the smaller goldfish sometimes up and around and sometimes down and out, with great difficulty swimming. Now he has been lying on his side on the bottom of the tank since last night - 18 hours. He flutters his fins, eats, but can't seem to swim at all anymore. Very sad.
Any suggestions? He is such a sweet guy. I have moved him to a netted breeding box suspended in the tank so that I can more easily feed him and watch him.
Forgot to mention, I have been changing water frequently, as it is a new tank set-up (every other day). Checking ammonia frequently. I am using already seasoned filters that I switched out from their old tank to expedite the cycling process.