I have a 5 gallon planted tank with 5 ADF in it so I think your good putting in 10. Just make sure you have a good filter these guys a really messy. About breeding. They will breed if they have the proper environment but you obviously have to have males and females. The way to tell he gender of these frogs is to look at here armpits. Females will have a bump under there armpit and males are just flat.