Leading question:
Has anyone experienced a discrepancy between a Hannah checker and any other test kits? I checked with a Red Sea Phosphate Pro test against my Hannah Phosphate ULR just now and the ULR is reading .90 (flashing to indicate higher values); Red Sea test kit (following the high value directions) gave me .255.
Is there a calibration solution for the Hannah?
Am I possibly doing the testing wrong?
Open to suggestions.
Has anyone experienced a discrepancy between a Hannah checker and any other test kits? I checked with a Red Sea Phosphate Pro test against my Hannah Phosphate ULR just now and the ULR is reading .90 (flashing to indicate higher values); Red Sea test kit (following the high value directions) gave me .255.
Is there a calibration solution for the Hannah?
Am I possibly doing the testing wrong?
Open to suggestions.