liquid drops are great.... they work well and should always be kepted to verify the meter now and again... Meters don't have to be calibrated that often and it is very very very easy to do... meteres usually come wth a netral solution that you can stick your meter in and dial it to 7.0... It works the same way with ec and ppm..
Garden Knowm Reviewed by Garden Knowm on . Question about EC PH Meters hi there, i'm trying to look for digital EC and PH testers. while looking i see that it is probably cheaper to get EC and PH testers that are one tester instead of buying them separate. does anyone have any ideas of where to get EC and pH testers and for a good price? Ebay is the best i've found so far with EC/PH in one for about $100~$120-ish. any help would be great. thank you Rating: 5