For those of you that have lived a little I'll let you in on a little secret, it's a quat. Yep, it's VERY similar to paraquat :exmark: according to my pop's (an ex rockstar chemical engineer who worked in horticulture), the molecule looks very specific, much more so than paraquat rendering it much less toxic and more reactive. The chemical is very short lived in aquariums, it reacts with the negative charge of the membrane surfaces of algae disrupting them and breaking them down. The details as to the product are very specific, I do not know exactly why it works, but it does.