Reddit reviews Hanna Instruments Waterproof EC/TDS/Temperature Tester
We found 1 Reddit comments about Hanna Instruments Waterproof EC/TDS/Temperature Tester. Here are the top ones, ranked by their Reddit score.
Automatic calibrationPocket sizeHigh accuracySimple
never store in RO water either. there should be a KCl solution for storage, if it's a good pen like a hanna or something. for the 20$ pens i store them dry, and just check them against known pH sources and cal when needed.
years ago i invested in a nice hanna setup, but i can use cheaper ones nowadays just fine. and i know my plants, if my pen is off enough to show on my cuts i'll notice it, but like i said, i check against known pH regularly. i only cal 1-2 times a year.
https://www.amazon.com/Hanna-Instruments-Waterproof-Temperature-Tester/dp/B007EFEJNS
this is a quality tester that doesn't break the bank. if you do somehow fuck up the electrode it can be replaced. but reconditioning in a NaCl solution works fine.