I'm going through the same battle right now with my new180. I don't even have any corals in it yet-just fish, CUC and a RBTA. I'm 24 hours into a 72 hour black out. I started dosing waste away (two 1/2 doses so far, as not to overdose) for the first time a couple days ago to see if the bacteria would begin to out compete the dino (not sure if it will work). I was thinking about going the h2o2 route but wasn't sure how the RBTA would react. Put food in the tank but didn't see any fish come out to eat, they're all hiding. Never fed fish in the dark, not sure what to expect.