So quickly my setup is 55 Gal FOWLR for now. Running a HOB Reef Octupus protein skimmer, also temporarily until I set up a sump I am using a HOB Filter. My Ammonia is 0 PPM Nitrite 0 PPM and Nitrate 10 PPM PH 8.4. Everything was going great, smooth until the other day my fish got lethargic (2 Ocellaris clowns, 1 Bi-Color Blenny). Then they stopped eating that same day, and the next day I started to notice a lot of twitching coming from all three fish. My inverts do not appear to be effected although it may be too early to tell but all my crabs shrimps and snails seem to still be eating and alive and well. I did a 5% water change almost immediatly but it did not appear to help the problem. I should add this all started the day after I added two Hydor 850gph powerheads with the Hydor Smartwave (they run one at a time but even if i ran both it shouldnt be too much flow). I don't know if that would have anything to do with it. But just in case.