2 2006 New member Aug 8, 2009 #1 I tested my tap water for phosphate and got a reading of 0 ppm with the Elos kit? API read 1.0 ppm so either user error or faulty test kit.
I tested my tap water for phosphate and got a reading of 0 ppm with the Elos kit? API read 1.0 ppm so either user error or faulty test kit.
