I have been reefng for about six years and I have never run into a cyno problem. BUT once I started using bio pellets back in August soon after the cyno came. I used Chemi-clean for he first time in October after being very hesitant about putting something in my tank with the name "chemo-clean " sounds like a floor cleaner. It works ! and it work great just make sure to take you skimmer cup off or you will have a big mess :)

First time was roughly mid summer I think an then again this past November around the 21st. It's lingering but I may hit it again soon. Each treatment seems to reduce its strength in returning. Last time I treated I increased Prodibio to boost bacteria after the course.

I've used it occasionally....always babysat the skimmer afterwards, and it got rid of cyano.

Thanks for the input everybody

I'm not looking for instructions or immediate result stories here

This thread is for long-term after effects

Last time I used Chemiclean was almost 3 years ago, when I couldn't get rid of it. I used MB7 as a preventative after that and never had a problem again.

I only did one Chemiclean treatment, changed the water, and did not see any short term or long term adverse effects. Having said that, I did not have any SPS at that time, just LPS and softies.

I've been hearing some good feedback on KZ cyanoclean lately. It does seem to take 7 or 8 weeks to work but you aren't killing all sorts of other beneficial bacteria in the tank etc.

Waste of money , I used it , came back with a army a month later .

So I bought a better skimmer , up my flow , and purged my sand and rocks every water change . Never comes back .

Sometimes it will show on the top of my over flow , but it never spreads and just tells me I need to do a little bigger of a water change this time and it goes away .


Find the problem . Chemiclean should only be used to save frags and corals from being choked to death .

Also have patience , it eventually will give up if you don't first .

i've done 3 treatments over the course of about a year. it goes away but it does come back after a few months. this time around i'm upping my use of a turkey baster as it's nowhere near coral choking power and i'm trying to beat or manage it without adding chemicals.

I used it once, it seemed to work but my skimmer was mad at me for days.
Over all I don't think I would use it again, I use MB7 now as suggested by " reef pilot" and seems to help a lot. :smile:

Used it roughly 9 months ago; worked great for what it needed to do. No issues aside from the skimmer taking nearly a week to stabilize. While using the chemiclean, I just took the collection cup off the skimmer and it became a super oxygenator for the tank.