Kem-Tek 177-6 1-Inch Chlorinating Tablets is part of the Chem Lab easy 5 Step 5 Color DIY pool maintenance program. All Kem-Tek Pool Products and Spa-Kem Spa products provide contact information for a Live 24/7 Consumer help line as well as an online interactive water testing application. + Product Description Poolmaster's Swimming Pool Collections consist of the essential must-have products for customary pool and spa maintenance, constructed with durable materials designed to keep your pool sparkling. For maintaining your swimming pool or spa's water chemistry, Poolmaster's 4-Way Test Strips are a great choice. The bottle features an easy-to-read color chart and strips have no-bleed pads for accurate color reading results. Tests for chlorine, bromine, pH and total alkalinity. Includes 50 test strips. From the Manufacturer Since 1958, Poolmaster has been a leading manufacturer of aftermarket pool and spa products with an unwavering commitment to quality, service and reliability. Poolmaster offers products across six different product lines- Backyard and Decor, Inflatables, Floats, Maintenance, Swim and Dive, and Toys and Games. Poolmaster - We Make Water Fun!