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- Sep 22, 2014
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ok So i have a hanna tester for phosphorus i ran the test and got 112 ppb so i convert that to parts ppm 0.112 so i read that you times that by 3 and you can get you PO well when i did that i got 0.336 so first did i do that right 2nd is that high if so then i know were my red slime is coming from and i can kick it in the A**