PH-Minus Liquid Anti Calc allows to lower pH values above 7.4. It contains a limescale sequestering agent that limits limescale deposits and helps to preserve pool equipment. This specificity makes it an ideal product for pools treated by salt electrolysis. With a sulphuric acid concentration of 14.9%, it is particularly suitable for automatic regulation systems for the general public. pH-Minus Liquid Anti Calc is compatible with all treatments (chlorine, bromine, active oxygen...), with all filtration systems (diatomaceous earth, cartridges, sand...) and with all coatings (liners, polyester...). Available in a 20L canister.