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The Poolmaster 8oz Pro Series Solution #1 OTO Refill, bearing product code 22398, is an essential reagent used for testing and maintaining proper chlorine levels in your swimming pool or spa. This refill solution is specifically formulated to be used with OTO (Orthotolidine) test kits, commonly employed for pool and spa water testing. Poolmaster, a trusted name in pool and spa care, provides this high-quality refill solution to help pool owners ensure that their pool water remains properly sanitized, clear, and safe for swimmers.
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