Awesome help guys! Yea im pretty set on a single species tank. With the hope of some spawning. I think im gonna go sand as well but i have a few more ?s. Sooooo, with my idea of a single-species tank with the idea to breed, what species would be easiest as far as maintenance and whatnot, how many can/should i have, and what ratio for male to female? Keep in mind id like to be able to have a dimorphic (meaning able to differentiate male from female) species. My other question is how do u syphon with sand without sucking up the sand? And another kind of off topic question, is 90 gallons too small to attempt to breed frontosa's? (i think it is) Again THANK YOU for all your info!