Thanks for the advise, I had a dwarf ACF for about 4 years...loved that little buggar to death. My two new ones ( I've had them for about 2 months now) are much bigger. One is about 3 inches in body length and the other is about 2 inches. I've been feeding them rosies purchased from the pet store. My old tank (3.5 gallon) has been cleaned and is cycling. I will try the guppies, not sure how to breed them though. I will pass on any type of bottom feeder, thanks again for chiming in.