Anyone use it in their FW tanks? A fellow aquarist with decades worth of experience with heavily planted tanks swears by it, and uses it in his tanks to keep the algae at bay and improve clarity by removing excess dissolved organics. He even doses with liquid ferts (small doses of Flourish) at the same time as he uses it. Just wondering if anybody else uses it, as I had heard that activated carbon was a no-no (gets rid of the good - nutrients, ferts - along with the bad). You can't argue with success I always say, so I'm more than willing to give it a shot.. But like I say, I'd like to hear the opinions of others.