I have become enamored with Apistos and Rams, and I've been thinking about building a rack of display/show tanks that would let me keep numerous species, but without mixing species in a given tank (I had a bad experience trying to keep Apistogramma cacatuoides, A. macmasteri, and A. agasizzi together in my 90g). Because my primary purpose is to admire these beautiful fish in beautiful surroundings (and because I'm a plant guy, too), the tanks would be planted/aquascaped, though for ease of maintenance, I would probably go with crypts, anubias, and moss that don't require high light and CO2. Driftwood would be copious (both for the look and the tannins), and I would probably use sand with leaf litter for a natural look and feel. Tank mates might include cories, otocinclus, ancistrus, and/or red cherry shrimp. I have a space in my basement that is 6' 5" wide, 24" deep, and 6' 7" high. I don't think these fish need tanks taller than 16" (in fact, 12" tall tanks would probably be fine, but 16" gives more room for plants and aquascaping), and I'm thinking a pair of 40 breeders side by side should just barely fit. I'm also thinking it would be cool to divide each breeder using either plastic mesh (perhaps with java moss woven into it) or the Poret foam that so many are using for bio filtration. That would, in effect, give me four 20 gallon tanks. I could probably do a lower row with either another pair of 40 breeders, or if height is an issue, 30 breeders. For filtration and water changes, I need something that is easy to maintain. I like what Pat and others have done with the Poret foam and air hoses - looks highly efficient and low-maintenance, and I think the black foam as a tank divider, while not necessarily attractive, wouldn't be too ugly (these will be display/show tanks, after all). An alternative would be to drill the tanks with overflows that run into a sump on the floor, where I could use the Poret foam in a wet/dry configuration like what Hans uses. Then, I could do water changes on the whole rack simply by draining and refilling the sump. Seems easy (which probably means I'm missing something :lol: ). Having a sump configured like that also means I could get heaters out of the individual tanks and just heat the sump, thus enhancing the aesthetics. What do you think? Is this doable? Is it practical? Will it be low-maintenance? What am I missing? Where are the potential gotchas (keep in mind, I've never done something like this)? How hard is it to drill tanks? I realize plumbing all of them into a sump means all the fish will get the same water parameters, but I'm fine with that. It's generally easier to keep water parameters stable with larger volumes of water, and in this case, we're talking about 160 gallons in the tanks, plus whatever I have in the sump. Any and all feedback, thoughts, and suggestions are appreciated. If I'm crazy, please tell me, and save me the pain of trying something that's doomed to failure!