You should diligently test the water in your pool and spa at least once per week—yes, it’s that important! Poolmart Center offers a variety of water testing supplies to help you measure pH, alkalinity, water hardness, phosphate, cyanuric acid, bromine, chlorine, and calcium levels. Our spa and pool testing supplies include test strips, reagents, and entire kits. We offer water testing supplies from trusted brands, so you can rest assured that your test is accurate, reliable, and high quality. Shop our selection of hot tub and pool testing supplies today, and make sure your waters are clean and healthy.