I have a ten gallon filled with guppy fry, which are going to be all moved to my main tank. I don't want an empty tank nor a tank that has to have the nitrogen cycle started again. So I ask the question, "what can live with guppy fry?" I ask this question because I need to use my 10 gallon tank for fry in the future. The fish should preferably have a low bioload, and (hopefully) pretty. Thanks!