Guys I feel like an idiot and an awful fish mom! I read that I could dose the tank with peroxide to help with the algea on several sites including r2r and since I have often dosed freshwater with it for black brush algea I felt safe using it. I tried it last night with just a partial dose and it killed my Peppermint shrimp and I think also the 4 corals I had in the tank. I didn't even dose at full strength. The fish all seem to be fine but I haven't seen my hermits or snails yet and my Pincushion hasn't moved but could just be sleeping still. I am heart broken and just sick about this! I don't even know what to do now... should I do a water change to make sure there is no peroxide left or add carbon to my sump or both...