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AKSBTEC Pool Test Strips for Salt Water Pool, pH, Chlorine, Hardness, etc. 8 Parameters-in-1 Pool Chemical Test Kit for Hot Tub, Spa, Swimming Pool, Accurate & Quickly Water Test Kit (8-in-1)100StripsAmazon$7.99
Pool Maintenance Log Book: A Swimming Pool Checklist for Keeping Track of Chemicals for the Home, Hotel, and Business OwnersAmazon$6.99
Hot Tub and Spa Maintenance Log Book: Simple Daily Pool Maintenance Checklist For Keeping Track of Chemicals in The Hot Tub and Spa For Home and Business Owners, swimming pool maintenance logbookAmazon$11.99
CREPRO Floating Chlorine Dispenser for Pools, Large Chemical Floater Dispenser for Chlorine Tablets up to 3.3'', Adjustable 4 Flow Vents for Pool, Spa, Hot Tub, and Fountain (3 Inch)Amazon