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Six-Position Valve with Positive Lock: precise mode selection and secure operation during maintenance
Simple dosing and routine: straightforward instructions fit weekly treatments alongside your sanitizer
Ideal for busy families and outdoor get-togethers
keeping filters cleaner between deep cleanings
Total Chlorine or Total Bromine
Haviland Durachlor Hardness Increaser Size:50 lb Six-Position Valve with Positive Lock:The Durachlor Hardness Increaser product is used to raise the total calcium hardness level in swimming pools. If proper calcium levels are maintained you can prevent the etching, pitting, and similar problems to the surfaces of plaster, masonary, and concrete pools. Raises calcium hardness levels Prevents surface corrosion Chlorine based
