The thing about the white clouds is they don't need a heater but it is preferred that they have some kind of filtration system, now for the guppies glofish and other danios they need both a water heater and a filter or they won't last very long. I work at an aquarium so I have a pretty good understanding of fish. The best thing for something that is 1 gallon or so is a betta. There are many different varieties such as deltas, crown tail, dragon scale, ect.. your local pet shop should have them. As for goldfish, they all get quite large usually a minimum of 12 inches and it does not matter how small of a tank they are in, the fish will continue to grow. Best of luck!!!!!Originally Posted by MarkieJ
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