We have a big tank 8' x 2.5' x 2.5', with a 4 x 2 x 2 refugium (planted tank) underneath and a 3' sump (and 1' trickle). We love it! We have a 2.5' giant gourami, about 30 clown cloaches, 30 yoyo loaches, 30 silver sharks (some of which are huge), 4 large sailfin pleco's. We breed bristlenose and cherry red shrimp and grow java moss and plants. In the refugium are rare L's, danios, flying fox, cherry red shrimp and ... I can't remember, LOL.