I've had two that were 2 1/2 inches when bought that are now 3 1/2 inches. I've had them for four months. I bought two babies about a month ago and they developed ick. One died the other is still going. I bought the little ones because I planned on putting the larger ones in a 55g. But now I would not seperate them. They act like a family. The little one stays close to the others, and they are always together. The one downside to clowns is they supposebly get up to 12 inches. I have only seen them at around 5 inches, but at that size they are very thick. Clowns like a decent current in the aquarium, temp of 77 or below ,ph of 6.0 - 7.5 and a kh of 8-12. I feed them a mix of hikari algae wafers, 3 kinds of flake, bloodworms, brine shrimp, and tetra algae wafer mix. They are messy with any food, but will usually clean up after themselves.