Eyeballing pool chemicals feels fast, but it can quietly wreck your results and your margins. I walk through the most common pool water chemistry mistakes I see on pool routes, starting with the habit of default dosing: “a quart of acid,” “half a gallon of chlorine,” and other shortcuts that ignore what the water is actually doing. With today’s chemical prices, accuracy matters, and the good news is it does not have to mean slow, complicated math. A simple dosing app like poolcalculator.com c...