Today i found my Green spotted puffer dead. I liked him alot. The water was fine and everything. I don't know what happend. He used to try to bite my finger whenever i stuck it in his tank to move something. Anyway does anyone know what good tankmates would go with fancy tailed guppies and swordtails? I'm looking for something that will go with them and is kinda not common. It's a 20 gallon by the way and there are 4 guppies and 2 swordtails in it now.