I agree with Aaron, cyano is present in just about every marine system. Not sure why you want to use a chemical to rid yourself of the bacteria. IMO it will just come back unless you get to the root of the problem. Cyano tends to grow in areas of low flow and places where detritus settles. If you have a decent amount of fish compared to the size of your aquarium cyano is pretty much unavoidable. Medium to high bioload = lots of detritus. Cyano feeds on detritus.
I get cyano even after a year and a half into my current setup and I am anal about my husbandry. I have a high bioload and feed heavily which attributes to the problem. I do not and never will use chemiclean to rid myself of the problem. What are the long term effects of using chemiclean in your system? Does the chemiclean bind to the rocks, silicon and other parts of the system which can lead to problems down the road? I don't know but im not willing to bet my fully stocked aquarium on it. What about short term effects. Have you done your homework on the product? You do know that it strips the oxygen out of your system right? Better have high flow and good surface agitation before using it. What is your plan after using the chemiclean? All that dead cyano has to go somewhere. Its going to go back into the water column as PO4 and a lesser extent NO3. What are your plans to remove the increased nutrients? A 20% water change aint gonna cut it. You see why I don't like it. There are just too many unknowns and essentially your just converting the cyano back into food to feed new cyano.
So how do I deal with it? Well for starters I love my fish. Not going to get rid of any of them to lower the bioload. What about feeding less? Nope, not gonna starve my fish so my tank looks pretty. So without lowering the bioload and reducing feeding the only option I have is to deal with it, which I have done for a while now. For starters I do weekly tank maintenance on Sundays. Every Sunday I take a small powerhead and use it to blow the detritus off of the rocks. I have a diamond goby who sifts the sand which keeps the bed clean from cyano. My fuges on the other hand are detritus traps so I manually remove cyano when I can. It still tends to build up over time so about every 3 or so months I do a 3 day lights out and this kills it all off along with other micro nuisance algae's. During the lights out and for a week longer I double my vodka/vinegar dosage and run GFO to deal with the extra nutrients, water change schedule increased to weekly instead of biweekly for 1 month.
This is what works for me, your mileage may vary. There is no such thing as a quick fix in this hobby so make sure you know what your getting into before doing it. Chemiclean does in fact kill cyano but it can also have some serious side effects if not used properly. Just make sure to research and research some more before using it to avoid any casualties.
