Max 140°F operating temperature — Withstands heated pool water and equipment outputs without warping or loss of integrity
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forgiving barrier
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No testing is required with this product
AquaChek Select Test Strips Size:50 Strips Max 140°F operating temperature —AquaChek's Select test strips allow pool and spa owners to test their systems for total hardness, free chlorine, total chlorine, total bromine, pH, total alkalinity, and cyanuric acid. Simply insert the test strip into the pool or spa water for 1 second, and several seconds later you have fast, accurate results. It is recommended that you test your spa before each use, and pools a minimum of twice per week, to get an accurate picture of the health of