Bob Lowry Explains Trichlor Tablets and Pool Acid Cautions

Think evaporation lowers cyanuric acid? Think again. We open the cover on persistent pool myths with help from the late Bob Lowry’s clear, data-driven explanations, and show how small assumptions can create big chemistry problems over a season. First, we break down why CYA never leaves with evaporation—only pure water does. That means every trichlor tablet quietly stacks CYA week after week, often hitting 100 to 150 ppm in a single swimming season. We compare sanitizer byproducts in plain te...