hi my auntie has just baught a 120gal coldwater tank with only 4 fish in it the fish are a male fantail goldfish, 2 commets and a pleco she cant put fantails together with commets can you i thought you cant tell me ppl am i right or is she?
Generaly you shouldn't, but commets with fantails are better then commets with eye handicap fish. Also if those are common plecos take them OUT! They'll eat the goldfish's slime coat. Try and see if she'll take the commets back or put them in a pond?
Mine (see sig) all live in happy harmony (yes I know the pleco is going to get big) at their current 3-4" size. In fact it's one of the fancy goldfish thats the bully of the tank!