The four baby goldfish I rescued from my contaminated pond last June have grown fat and healthy in a tank indoors. This means that the water is quite warm compared to the pond. I'm worried that if I don't return them to the pond now, before the water gets too cold, it will be six months before I can do so. I'm finding it difficult to keep the tank water clean now, in spite of the pump/filter, and as they grow it will become increasingly a problem so although I enjoy my babies indoors, would it be better to put them back into the pond now?
Tricia