I have 4 zoas, 5 SPS corals, and 2 LPS. Most require moderate currents except for the 2 Birdsnest I have. It use to be a FOWLR. Im more concerned with the fishes as im running a mini protein skimmer and HOB filter with a GPH of 200 and they stay away from that area of the tank. Ive been reading so many different GPH for reef tanks of my size. I have two clowns, I watchman goby, fire fish, and a blue green chrome, along with a royal gramma, and 2 shrimp if it helps.