Crash/420
Active Member
I have that Hanna as well as a blue, right now I also keep the drops handy. When things look wacky on the meter, I always used other methods to test before making changes.
I bought my hanna meter before I ever grew my first plant about a year ago, but it didn't have the manual with it and the guy at the hydro shop (that closed) didn't tell me about them drying out. I noticed it being funky about 2 weeks ago and found out about the solutions and stuff here in this thread. I think? Anyway I decided to just get a replacement probe for it and the 4 bottles of solution needed for it since it is gonna be a secondary check to the blue lab guardians.