COnvict cichlids are prolific breeders..............A pair can easily lay two spawns every month...........The fish can easily be bred in 10g tanks.............Setup 3 tanks with a pair in each one.............Doing the three tank setup ensures a steady flow of fry anytime............whats easier. Trying to breed to feed cichlids and eels.
self cloning crayfish. No breeding necessary.
http://www.tfhmagazine.com/freshwater/feature-articles/owning-clones.htm