finally I got fishies! These are chinese white cloud minnows which are supposed to be one of the easiest fish to look after. They don't need warm water and can survive in just about anything - though I intend to look after them well of course. They're used to living in fast-flowing streams and they seem to really enjoy racing up the stream of water coming out of the filter which I thought might be too strong but clearly isn't. I'd like to get some shrimp to go in the bottom of the tank but it's not easy to find the varieties that like cold water, but I'll keep looking.