That PH meter was roughly 15$ I got it offline, and I too was scared about that it was giving me false readings, so when I purchased a PH Up & Down Kit it came with a small vial an a solution that you add 3 drops into the vial that has some of your tanks water in it, an whatever color it chanes too is the PH, I've been using both to make sure so far they are both on point.
DanteDemont Reviewed by DanteDemont on . Nutes GH Flora Series.... n00b... wut? Okay I have an indoor stealth hydro drip system bubbleponics setup, I have 4 planted an 2 opening. My seeds just started to sprout up, 2 out of the 4, the other 2 are curled up a little outside of the Rockwell. I use the flora series. Okay so I've looked at several threads an I'm an idiot. I still don't get it. What should I be adding? I added a small dose of flora bloom, grow, an Micro like below 5 ml, just under. An I mixed it all in my solution. Rating: 5