I want a tank for raising fry, and possibly serve as a quarantine, and whatever. I want to breed bettas, guppies and mollies maybe but I don't think I want to spawn angels in the tank, but if my future angels spawn in my community tank, i would like to use the extra tank for the angel fry.
As i want the breeding/quarantine tank to be continuosly running, I should probably have some fish or aquatic creature in it. The aquatic creature obviously would have to be harmless enough not to attack eggs, fry or sick fish. it would have to be able to get along with the wide variety of fish that may be put in with it and it must not be valuable enough so it wouldn't matter if it died.