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d0ughb0y · 02/01/2018, 09:22 AM

have you tested with a new or another test kit?
if not, you can verify your current tester by testing rodi water and the reading should be 0. this is just to make sure your nitrate test is valid.

02/01/2018, 09:22 AM	#26
d0ughb0y Registered Member Join Date: Mar 2008 Location: sf bay area Posts: 5,165	have you tested with a new or another test kit? if not, you can verify your current tester by testing rodi water and the reading should be 0. this is just to make sure your nitrate test is valid.