Pool chemicals - use PH Minus :

Correct adjustment of the pH of pool water is a prerequisite for perfect function of the vast majority of plant and advice for creating pleasant conditions for swimming . The water in the pool and hot tubs has a pH in the range 6.8-7.6 , if this is found to be a suitable pool- tester . PH higher than 7.6 in water causes mineral opacities may become obstructed by filtration , reduces the effectiveness of disinfection , there is irritation of the eyes and skin . pH lower than 6.8 causes corrosion of metal and concrete , fading colors , eye and skin irritation . When the pH is higher than 7.6 is used to decrease the pH MINUS this preparation . Adding 80 g pH MINUS for every 10 m3 of water in the pool is reduced by about 0.1 pH . Measured amount of preparation is dissolved in a plastic bucket with water and poured into the deepest part of the pool running water circulation . After a thorough mixing of all water in the pool is carried out re- measurement of pH and the resulting index , where the entire procedure is repeated .