No problems with too many fry, as of yet... I'm sure my betta is thrilled after every delivery... Every week when I clean the tank, I look really hard for fry and catch them and put them in a breeders net in another tank.. only up to 12 fry now. I know I don't have the tank space, but (call me cold, but they gotta eat too) I have a friend with an oscar that would love some parasite free, very well fed (haven't had any diseases in a year) live food.