Curious if its even possible though. i was wondering if i set up a larger tank, and put a pair on convicts and a pair of salvini in in. is there any dithers or catfish that would help control population and not get destroyed. my goal is to create an enviroment big enough to where the pairs still come out to make sure the terriory is doing good and just chase away the dithers. and have the dithers/catfish eat the fry. is there any peaceful way i could make this happen? would i need something really big, like, 180+.