PhosBuster Pro...does it work?

I see this in the Dr's F&S catalog and it's description sounds great and I'd like to try it to get rid of some cyano but want to make sure it doesn't have any nasty side effects and that it works to begin with.
 
i would not touch it with as 10- foot pole

i would stick with iron based media rowa, phosban, ect ect
 
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