Hey Pool Owners! Are chlorine tablets destroying your pool? These slow-dissolving tablets are a handy way to keep your chlorine levels up for a longer period of time. But they can cause a whole bunch of problems if you don’t watch your other chemical levels. Trichlor tablets are stabilized, meaning they contain cyanuric acid. And that means they can raise your CYA levels really quickly. They’ll also erode plaster surfaces and vinyl liners if the chlorinated water starts to collect in one area. A