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I bought this years ago, must have been at least 8 years. It's been sitting in a box, uncapped and dry for the past 5 years at least. I poured some fresh ph4 and ph7 into clean cups I picked up yesterday for my nutradip. It still seems to be pretty accurate. Is this normal? Figured the probe...

Ok so I bought this brand new, they calibrated it instore. Everything seemed fine the first week then it was like it started to drift around, so I would recalibrate and it was good for abit. Then I started hearing that digital ballasts can cause interference with certain pH testing equipment and...

I want to be on top of my watering this time around and using sunshine mix#4, do I want my ph for hydro or soil? I've googled and getting mixed answers. Thanks

Hi group! I used to grow years ago, stepped out of it for a few years and now back to growing. Here's what I'm working with. -Mammoth Classic 90 tent(3x3x5.3) -400 watt Ace digital ballast -100 watt from the wall LED panel -190 CFM inline exhaust -Nutradip pH meter -Sunshine mix #4 I have 2...