The coral snow is no longer working for the cyano. It came back 10 times worse after about 4 days of being gone completely. Nothing had changed in that time except I was feeding much less to the fish.
I still dont want to use any chemicals, so I am going to do the lights out for a few days. I have added a few new corals though two days ago and was worried that maybe going lights out on them already may just add more stress than normal since they are new to the tank? They did come from a members tank and have acclimated great.
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