SpaChoice 472-3-5051-04 Alkalinity Increaser, 4-Pack

SpaChoice 1-Pound 4-Pack Premium Alkalinity Up, Alkalinity Increaser for Hot Tub, 100% Sodium Bicarbonate, Made in USA

SpaChoice 2-Pounds Premium Re-Energize Spa Shock, Hot Tub Shock, Made in USA

EASYTEST 7-Way Pool Test Strips, 150 Strips Water Chemical Testing for Hot tub and Spa, Accurate Test Bromine, Total Alkalinity, pH, Free Chlorine, Total Hardness, Cyanuric Acid, and Total Chlorine