I finally got my male guppies into their ten gallon tank today. So my little rescue female betta, Kalika, went into the 5 gallon Fluval Chi that the male guppies were in before. She's swimming around exploring, and seems very happy to finally be in her "big girl" tank, since she's nearly adult sized now. The "fraternity" of male guppies is happy in their larger home, too. Our bedroom now has THREE tanks on the dressers. It's so pretty at night when all the tank lights are on!