The unique ionic composition of ChlorDown boosts the efficacy of free chlorine in your pool or spa meaning less chlorine is needed to operate safely and effectively.  

Peer reviewed studies show the ions used to make ChlorDown increase chlorine efficacy against the bacteria and viruses found in pools and spas as well as making the chlorine residual more stable.  Lab testing supports this and also has shown that 1.5ppm of chlorine with 0.6ppm of ChlorDown is more effective that 3ppm of chlorine against coronavirus after 30 seconds.

When less chorine is added so less of the dangerous disinfectant byproducts such as chloroform and other trihalomethanes are produced as bathers swim. This in turn improves both the air and water quality.

Trihalomethanes have been reduced by as much as 150% in published pool field trials of the ions found in ChlorDown combined with free chlorine. With new DBP limits for pools being introduced, ChlorDown is a cost effective way for pool operators to mitigate the impact of halogen biocides on their water and air.