tank had a marine land 400 filter then i bought a PS 75 Odyssey PS 75 protein skimmer. livestock is 2 clown fish 2 lyertails, 1 coral beauty, 1 domino, 2 peppermint shrimp, 4 nassarious snails, 4 hermit crabs, just found a brittle sea star and some fish that is half orange and half purple...