Group Delta chlorine tablet These tablets contain chlorine compounds and are often used in pools, SPAs and other water systems. Chlorine tablets allow the purification of water from microorganisms, bacteria and other harmful substances. Group Delta chlorine tablets are specifically formulated to provide chlorine release into the water. These tablets slowly dissolve when they are thrown into the water and release the chlorine. This process allows water to treat water continuously with chlorine and prevent the formation of microorganisms. The use of these tablets is very practical. Pool owners, SPA owners and users of other water systems can maintain chlorine levels by following the instructions requiring a certain amount of tablet to be thrown into the water. can be used. Chlorine is a common method of water disinfection. This is because the chlorine helps to clean the water reliably and keeps the microorganism population under control.