Larry, Thanks Larry for your input, are you currently "algae free" or "drastically reduced"? If "drastically reduced" algae levels, what type(s) survived? I understand that BBA is one of the most difficult to eradicate, did you have hair/thread algae prior to treatment and did the treatment eliminate it? I put my first treatment (10 ml per 10 gallons; 2 times normal initial treatment) in this afternoon after a 20% WC. PH = 6.8; KH=4.0; CO2=20-30ppm. I am going to dose at 2 times normal daily rate for the next 10 days and check the results. This is a level that was used by an individual on APC who eliminated his hair algae. This week I am ordering test kits for Ammonia, Nitrites, Nitrates, Iron and Phosphates (unless I can find a good "Master Test Kit" that will cover these tests). Once the algae is cleaned up, I want to be able to monitor conditions to minimize re-growth. Roy _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member