Yesterday one of my platys finally dropped her fry, and I was surprised with some where between 30-40 babies, give or take. Right now everyone is in a 10 gallon tank in which I had the mother in (she has since been put back into the community tank. The 10 gallon is only going to work for long, so now I am planning on working on setting up my grow out tanks. What I am thinking of doing is getting a couple of 20 gallon high tanks with a stand that will allow me to stack them, since space is limited. I am planning on doing sponge filters in these tanks. Haven't decided on a substrate yet, thinking about possibly doing sand as the substrate, and will be planting the tanks as finances allow. What are your thoughts on splitting this many fry between two 20 gallons for growing out to sellable size. I figure I have some time to get things figured out and set up before the 10 gallon becomes insufficient for everyone.