Waterbear I really dont know how you keep the borates high enough, every time I add Borax it rains and I need to add more. I have given up. I would be adding Borax twice a week and it would just take the place of the acid I have to add every two days. I am glad it seems to be working for some of you, but I have had no luck. I get to the 50 ppm and it rains and I am back down again. I think I will just keep adding acid and occasionally buy some polyquat 60. I think its an even trade.