I will say it does work on cyano. I have done 5 treatments and I just have a few patches here and there now. When I started using it, cyano was covering most everything. I had neglected the tank for over a year and have been trying to get it back into shape but the cyano was taking over. The tank is starting to look okay now, just way understocked with corals.

I haven't noticed any problems with any of the livestock although I don't have much right now. I mostly just have the frags I got from the frag swap since most everything I used to have died. I did loose some of the frags from the swap because the tank wasn't in good shape yet. All of the frags from the swap that made it are growing well now.
I don't usually like to put unknown chemicals in the tank but I figured I had nothing to lose. I looked up the species of algae it is supposed to get rid of and one of them was a kind of cyanobacteria. I also noticed that my skimmer started working much better after dosing Algae Fix. I'm not sure exactly what it does but it seems to work pretty well.
Oh, also, my water isn't going to test 0 TDS. I am using well water.

And before anyone starts on RO/DI ask anyone who saw my tank when I used to take care of it. My tank tests 0 phosphates and high in calcium since it is coming from limestone. I actually have an RO/DI but I had better results without it. Not doing a water change in probably a year could have something to do with my cyano problem.

I am not saying all tap water will work but some will. BTW, I drilled it as well.

It's the family business.