The Complete Series Test Kits allow pool professionals and homeowners to monitor seven vital water quality components to assure balanced water. Sanitizer levels and pH are determined colorimetrically using the 2000 block, while simple block titrations are used for the acid and base demand, total alkalinity and calcium hardness analyses. Each Kit contains "Pool & Spa Chemistry; A Testing & Treatment Guide with Tables" booklet and a watergram (a slide wheel that correlates pH, temperature, calcium hardness and total alkalinity for balanced water). Taylor Technologies is the most respected name in the water testing industry. The K-2005 model test kit will serve all of your pool water testing requirements.