I got a dosage of this from my LFS and was afraid to try it. Finally the cyanogen was so bad I felt I had no choice. I treated and cleaned/picked at the cyanogen for 2 days. Today did the 205 water change and I am real happy with the results. It didn’t kill anything in my tank. It should be noted to add a large air stone under one of the wave makers to hyper oxygenate the water. If you don’t do this you could possibly loose some livestock.

Don't care if it works or not. Looked for this Chemiclean at my online supplier's. There all around 15 bucks. Looked online local and see Petco has it for the price. Went there and picked it up and it is 25 bucks. Never will i go in Petco again.

Got rid of my cyano problem within 36 hrs. No need for 2nd dose.

I followed the instructions just as it says on the carton and it got rid of those unsightly red and green stains left behind by cyanobacteria!

The chemiclean took care of a mild case of cyano. It was gone after 72 hours.

I've been struggling to get rid of blue-green algae for months and could eradicate it. I read about chemiclean and decided to give it a try. I dosed once but did not see much change on the algae level in a day or so. Then I treated again with a second dose. It appeared its effect is mild and it takes some time to kick in. In less than a week all the blue-green algae disappeared from my tank. I recently did a 50% water change to remove the added chemicals and planning on more water changes soon. Also for the record, my plants remained unaffected by the chemical. They actually started to grow faster after the algae competitor disappeared. I had no fish in the tank so I can't report of effect on fish.

It works and I recommend it.......................

The product does seem to work at first, got rid of most of the bluegreen algae after about 3 days but then it came back after a week or so. It is kind of pricey and you get very little of it especially if you have to use it several times in a larger aquarium or fish pond.