Personally i have had it a couple of times, and the best thing is.... chemiclean read slim remover. added it to my tank and 48 hours later it was gone. I did the light thing once and it just came back twice as bad. i highly reccomend this product to anyone and you don't get ****ed off coral cause they didn't get any light and its safe for fish. No deaths, besides getting rid of the cyano.
btw this was in my 10gal, aka the horror story. and not worth running a phosban reactor
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