Just keep up with maintenance, water changes and keep everything the way it is supposed to be like temp etc. Not to big water changes tho. like 20% is fine. If you have tank mates in there you should put some rocks against the divider so there wont be any bucking between the fence. its alittle challenge to keep all the fry alive because they are so fragile. Make little little caves for the fry incase the parents eat them so they can hide from them after couple weeks or so. feeding, you can get some guppy powdered food for them for like 6$. Then later advance to flakes then smaller pellets and they wont grow fast unless you have a huge tank like a 180 cause then you would notice a great growth rate in them. Turn off lighting at end of day to decrease of algea growth cause its really hard to clean with the fry and parents in there nipping at your hand. I would recomend a bigger tank for you to, what size is it anyways? Filters, equpiment etc.... that you can get better help.