Hi Shango, I got rid of mine by removing as much as I could manually. Then I dosed 1/8 tsp of Potassium Nitrate (KNO3) per 10 gallons daily. I did a 33% water change weekly. It took about 4 - 6 weeks to get rid of it. My BGA seems to show up when I let my nitrate level drop. Roy BTW, this same procedure has worked for other members of GSAS. _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member