What I've read several times is to use multiple tanks, and use convicts. Get the parents out right after spawn, and they'll spawn again in 2-4 weeks. You wouldn't need fancy tanks - heck, just get a few rubbermaid 50gal tubs from WalMart and put a HOB filter on 'em.
But you should also try the above stuff and get them to eat things besides feeders.
But you should also try the above stuff and get them to eat things besides feeders.