Susan, Glad the Excel treatment is working for you too! I am hopeful that the "maintenance dosage", in conjunction with regular water changes and maintenance will prevent reoccurrence, or at least minimize the re-growth in the future. I don't care if I have a little algae (after all it is part of nature), I just don't want it to be what people notice first when they look at the tank! How is the turface you tried in your 100 gallon working? I have been thinking how I want to set up the 30 gallon I just got, and I was thinking of trying something other than the "natural gravel" that I use in my other tank. Roy _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member