Lewydeville
Well-Known Member
"DO NOT soak or store any pH probes in purified water like distilled water, deionized water, or reverse osmosis water since it could cause damage to the pH electrode and the tester could give erratic readings. Rinsing the probes in purified water is a good practice. Just don't store them in purified water. If you accidentally store the probe in purified water, try storing the probe in 3M KCL storage solution for 48 hours and see if the tester can perform in a normal state."
Exactly what Shed said. For some reason there is information floating around that keeping ph pens in distilled water is ok but it’s definitely not. You can use storage solution but a great tip I got from the lad who works at my local hydro store is to use this.
He said it’s perfect for storage and you can keep an eye on the calibration daily. I’ve used it for years now and on the same pen!