My Water Quality Report shows:- Phosphorus Min <16.0 Average 487 Max 912 UG/L What does this actually mean ?? How do I compare it with Phosphate ppm or mg/ltr ? I need to know if these levels are considered high or low & how do they compare with the recommended levels of circa 0.1 ppm ? Any help would be appreciated. Thanks ! andy at ascot_u-net.com