General Reef Discussion
I have a question for some experienced reef-keepers in terms of powerheads. I have a few "canary" corals in my 40b (has a 20g sump with protein skimmer, macro, 80 lb display LR+20 lb rubble in sump, approx 420 GPH return pump, 6x35W 36" T5HO bulb ballasts). A ricordea, a sun coral, and a two...