What Is Cyanuric Acid?

What Is Cyanuric Acid and Why Most Pools Have Too Much of It?

Cyanuric acid (CYA) is a chemical used in pools to help chlorine last longer in the sun. It plays an important role in keeping your water clean—but only when it’s in the right range. The ideal CYA level is 30–50 ppm (parts per million). If it’s too low, chlorine breaks down too fast. If it’s too high, chlorine stops working properly.

Here’s the problem: most pools have too much cyanuric acid. It builds up over time, especially if you use chlorine tablets or stabilized shock. High CYA causes what’s called “chlorine lock,” where there’s chlorine in the water, but it’s not doing its job. That leads to cloudy water, algae, and wasted money on chemicals that aren’t working.

In the past, the only solution was to drain and refill your pool—but not anymore.

Introducing the BIO-ACTIVE Cyanuric Acid Reducer (8 oz) — a natural, safe, and fast way to bring your CYA levels back down without draining your pool. It uses advanced biocatalyst technology to reduce cyanuric acid levels quickly and effectively. Best of all, it’s:

• Nontoxic, nonallergenic, and nonpolluting

• Made in the USA

• Easy to use and safe for all pool types

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Stop struggling with high CYA and weak chlorine. Fix the problem with BIO-ACTIVE.

👉 Shop now and get your pool back in balance—naturally.