A 10 or 20 gallon aquarium with an air driven sponge filter is a relitivly cheap way to set up fry tanks. It's better than losing batch after batch of fry.
With no disrespect, what do you have planned for the convict fry? I know around here in Denver, they aren't worth much when you try to sell them (either privately, or to a LFS). Just curious.
I agree with the 10 gallon w/ sponge filter as a cheap way to help with the problem.
i intend maybe to sell them to a lfs, or if that doesn't work out use them as feeders for my other fish, i am hopefully getting a 55 before to long and the cons will go in it and the fry will go in the 10 that the parents are in now