I have two fancy guppies, two swordtails + 17-30 fry, two rainbow platies, two mollies, a pleco, a newt, and an albino botom feeder thing i don't remember the name.
one is ten gallons(colony) and the other is two gallons(fry) I also have a fancy guppy whose gravid spot is really black so i put her in a breeding net. Keep fingers crossed.