there is something in tech m recepy that works for killing bryopsis, i have used it with great results. Now for the BRS MG, that will get your MG to great readings but will not do anything for your algae problems. Rob may be on to something though, maybe using more of one and less of the other is how they come up with it and is cheaper but till its decoded we wont know. So to be sure, just get some cheap MG and dose it at the same time you dose some Kent MG that way it lasts way longer and you win the battle with bryopsis. I have been doing it like this for a month now and the little bryopsis i had is pretty much gone.