A grow out tank is a separate tank that houses fry. Now that I am thinking about it, since these are feeders anyway, maybe the best idea is simply to have a trio or even 3 females and one male with some plant cover. They have a gestation period of around 4 weeks. Mom can have as little as two (when she is young and immature) to as many as 200 fry. (this is the main reason I thought of a grow-out tank in the first place. As the females get older and bigger, brood sizes increase dramatically so, with 4 females you could feasibly end up with 400 fry easy). So, you are looking at lots of feeders. 