blue works saltwater generator chlorinator blh20 for 15k gallon pool | 2-year full usa warranty | cell plates made by usa manufacturer(white) blue works the blh20 works with your current pump and filtration system to provide you with a safe supply of chlorine to enjoy in your pool daily. the best part about using a salt chlorine generator is that there are no harsh chemicals that can be harmful to the skin and eyes. the blh20 is easy to install and will save you hundreds of dollars in pool maintenance.