Mistake #1: Testing hot water. Your meter will give you a number, then a sad beep, then possibly cry. Always use room temperature or cold water. Heat messes with science—and science is grumpy enough.
Tds Ec Meter Reading Chart – What is a TDS Meter and Do I Need One
Mistake #2: Forgetting to shake the bubbles out. If your water is fizzy, let it sit first. Carbonation is just drama. Let the water calm down before you probe its secrets.
Mistake #3: Testing sea water. Just don’t. The reading will be “ocean.” You’ll get a salt plaque for your trouble. Stick to freshwater unless you’re a marine biologist.
