anyone runnig this product? I am fighting a ton of cyano suddenly and looking for some options besides more water changes. I am running the little fishies 550 with GFO on my 300 and don't have that many fish in my 300 but the skimmer blew up this weekend so a smaller pump- sedra 3500 is powering my euroreef skimmer till a new sedra 5000 needle wheel arrives. I was struggling with cyano before the skimmer pump went out but on a smaller basis but this crap grows overnight, well I should say during the daylight anyway.