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Sodium tetraborate.

I haven't seen a water bug since I added 20 Mule Team to between 50 and 80 ppm of sodium tetraborate. Pool has never looked better, and algae blumes seem to be a thing of the past. No regrets with 20 Mule Team. The family has even noticed a nice feel to the water.

My pool store told me to add CYA at the beginning of the summer, and then subsequently kept telling me that my CYA was 150. I ended up draining half my pool to get rid of it. The store then tested my CYA at 150 again, and again, and over two weeks, testing every day, it went to 130 and finally...

Do you mean that the higher the CYA level, the less we need to worry about bleaching?