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#6
02-03-2014, 04:51 PM
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I have a Hanna for PO4 and it measures in "ppm", I have not yet gotten my PO4 under 0.09 ppm & often wondered if my tester is off. Then I measured the water from another guys tank and came back at 0. So, I have a surplus of PO4 in my tank and I am running a healthy diet of Rowa to try and absorb it all.
My question is why does your Hanna PO4 tester measure in ppb and ppm ? 
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