hi yall, i don't know if that's what i have but a friend of mine said my problem was high phosphates in the water and he gave me some Phosgard that i stuck in the filter. the situation is much better now, 2 weeks later, with only a few tufts here and there. before, it was overtaking my swords and java fern, which were duly pruned to get rid of the bba. tsuh yang chen, nyc