While adding a fuge with cheato, not overfeeding and also adding a reactor with carbon and gfo is very good advice are very good steps in curing the problem. Why not just do those steps and not turn off your lights? You would have had the same affect anyway. Turning your lights out for a few days can stress corals that may already be stressed due to high phosphate and can also cause some browning out of the corals. While it may not kill the corals unless already stressed it just seems necessary.
Dave Polzin
Dave,
I am not trying to disagree with you about your solutions to these problems. Yes the root cause needs to be addressed. He seems to be running macro algae in the fuge but still has the problems with the cyano bacteria. I am just offering a different proven solution to the help with the problem. There are as many differing opinions in this hobby as there are aquariums. Some are right and some are wrong. That is what I love about this hobby and the people that enjoy and are passionate about it. I have done all of these suggestions in the past,except the chemi clean, and while they partially cleared the problem up it never "went away". I stumbled on a a thread similar to the one I linked earlier in this thread that suggested turning out the lights and I thought "why not?". Well I did just as I described earlier and let me tell you it WORKED! I was overjoyed to say the least. I have not noticed that ANY of my corals or clams suffered in anyway. Actually the polyp extension vastly improved in the following days and weeks. I am not in any way suggesting that this is the ONLY way to treat this problem. That would be silly. I am just giving MY own experience with this problem. I try to do this with any advice that I give. If I haven't personally tried it I don't like to advise anyone to do it. Again, thank you for your opinions about this hobby I can tell that you love this hobby as much as I do! And please don't think I am arguing with you. Your suggestions are proven as well.

