Dear Dr.Tim, Before I start let me give you a brief about my system. Its a 33g rimless tank that I mainly hope it will turn out to be an SPS tank. For lighting I am using ROIII pendant with 250W phoenix. For filtration I have SWC skimmer, 100 micron filter sock. Water movement is provided by a vortech mp40 and a maxi jet return pump. For fish I have pair of clowns, fridmani, green chromis and african pygmy angel. Corals grow just fine. My long lasting problem has always been cyano bacteria. I have no problem with any other type of algae. I added few photos to give you an idea of how bad the situation is right now. To speak the truth I feed moderate to heavy but my NO3 has always float around and less than 5ppm and PO4 around 0.03 (Hanna). I use NSW since as I have an access to a clean source and I use chlorine to be extra sure and then dechlorine it after 24h. I know exactly what my problem is and I am looking for a permanent solution. I have lots of dirt's and debris laying around in my tank. I try to siphon as much as I can but no matter how hard I try particles covers every thing. once not long time ago I took off the whole sand bed and the cyano was cleared completely for like months then as dirts build up the problem come back again. So after reading about your waste-away product I think that this is what I am looking for. So if you dont mind I would like to make a log of things progress and hear your thoughts and ideas. The waste away is on its way and I can not wait to have this thing in my hands. I will go as you directed with 1/4 the dose until I see no cloudiness and build up my dose till I reach a full dose. Here are some photos for your enjoyment ;D I did not order the re fresh. I dont know if I should ? As I said i am looking for a permanent fix so I thought the waste away would be the best choice. Looking to hear your thoughts .