Take your meter and dip the metal probes into the water. Not too deep—just enough to cover the tips. Think of it as a polite handshake, not a full-body dunk. Hold it steady for about 10 seconds. The number will stabilize, like your friend after their third cup of coffee.
If you’re testing tap water, have a glass ready. If you’re testing your fish tank, please don’t confuse it with your drinking glass. Yes, I’ve seen people do this. The fish are not impressed.
