I have a 50 gal
community with a variety of fish. In an otherwise perfect tank, I have a lone rainbow who has been losing weight to the point where I don't think he's going to make it. He will agressively eat the flakes offered to him and rest of the tank but quickly spit them out. He will repeat this process until all the food has been consumed by everyone else.
Last night I had to put him in the 10 gal
, because he has weakend to the point where he can't even defend himself against his mates. He seems to want to eat and sucks in the food, but again, just spits it right out. Any suggestions???