I wouldn't use it for minor issues. I had dinos and still really didn't want to do it. At a point alot of my corals were closing do to the dinos. So at that point everything was being smothered anyways so really didn't have much to lose. So I went for it. It worked well and my dinos are gone. A friend and I both lost a fish right after dosing peroxide coinsinadence maybe but could had something to do with it. Zoas will close up right after dosing
I have nothing but good things to say about spot treating breakouts in my tank with peroxide. No coral or clam loss, heck nothing even looks irritated after spot treating a few ml even right at some acro's base. I only need to do it once every few months now for stubborn bryopsis that still comes back in some nooks.
