Cranit Tester for swimming pools 4 in 1

It is an identification strip for the determination of total and free chlorine, pH and total alkalinity.

Instructions for use : Immerse the strip in water and remove it immediately. Hold the strip for 15 seconds (do not shake any residual water from the strip) and then compare the color of the box for total chlorine, free chlorine, pH and total alkalinity with the color scale on the package label.

Subsequently, the pH value is adjusted to the range of 6.8 - 7.6 with Cranit pH plus or Cranit pH minus and the chlorine content to 0.1 - 0.5 mg / l with Cranit chlorine shock, Cranit Triplex or Cranit Quatro according to the measured values. .

pH - expression of acidity or alkalinity of water, the optimal pH value of water in the pool ranges from 6.8 to 7.6

free chlorine - the main carrier of the disinfecting effect, eliminates microorganisms, such as bacteria and algae, the recommended value of free chlorine is 0.3 - 0.5 mg / l

bound chlorine - part of the total chlorine, eg in the form of chloramines, is an undesirable form of chlorine in the water, the value of bound chlorine in the pool should be up to 0.3 mg / l

Bound chlorine = total chlorine - free chlorine

Total alkalinity - represents the sum of basic substances dissolved in water, which prevent sudden changes in pH, the optimal value of total alkalinity ranges from 80 to 120 mg / l, affects the effectiveness of disinfection, adjusting pH values, the formation of precipitates of various components of water and on the corrosion of metal parts.