i have a 6 gallon nano-cube, i have two green chromis, a clown goby, two camel shrimp, the biggest mexican turbo youll ever see, emerald crabs, hermit crabs, a nudibranch, a boxing crab, 4 little torchon snails, some bumble bees, thousands of isopods, greens and unfortunately a huge amount of aiptasia. everything is thriving.