This product killed off the cyano outbreak in my reef tank in about 3 days without harming any of my fish or coral. I deducted 1 star because it over activated my skimmer and continues to provide problems after 3 25% water changes. I will update again if I notice any other changes.

Work's as advertised gone in 3 days! No problem with tank life, if you have a skimmer you will need to run activated carbon and turn the skimmer down for a day or two.

I didnt believeMy reef was full of cyano! Afrer the first treatment they disappeared, and fishes and corales seems to stay well.It works

I have had a salt water aquarium (24 Gallon) for almost 5 years now and after about 1 year it started to grow the cynobacteria that began coating the live rock in red slime. It got really bad before I found out what it was and how to get rid of it. I have always used the Chemiclean product to get rid of the slime. I need to use it about every 4-6 weeks to keep the slime under control in my tank, I admit though that I only do an average job of cleaning it and doing the proper water changes which if I was more vigilant would probably cause the redslime to grow slower.I used to buy the smaller sized bottle which each lasted me about a year each but this time I decided to get the bigger one that is cheaper overall and should last me quite a bit longer. Regular use of this product, allowing with water changes, should keep your tank in check. My fish and invertebrates never have seemed to suffer any ill effects from using this product in the recommended manner.