D darth maul Active Member Mar 6, 2008 #1 what tester do i need to measure the the ppm for my nutes ec tester or tds tester ? i know its a stupid question but hey we all have at somtime or another.
what tester do i need to measure the the ppm for my nutes ec tester or tds tester ? i know its a stupid question but hey we all have at somtime or another.
