Why is pH important?
Swimmers comfort is affected by the pH of the water. Most people swim with their eyes open. The pH of tears is about 7.4. Pool water with a different pH will irritate the eyes. So test the pH and adjust to 7.2. The natural tendency with Sustain is for the pH to increase slowly. b) The effectiveness of Free Available Chlorine (FAC) is influenced by the pH. As the pH increases, the effectiveness as a sanitizer decreases. For example, at pH = 7.2 the FAC is about three times as effective as the amount would be if the pH = 8.0. For the FAC to be most effective, without swimmers eye irritation, the ideal range is 7.2 – 7.4. c) As if providing comfortable and healthy water is not enough, pH is also an important factor in protecting your pool investment. Pool liners, plaster, tile grout, heaters, pumps and metal fixtures are attacked by aggressive, acidic, (you guessed it) low pH water. Alkalinity or Total Alkalinity (TA) is a measure of the carbonate, bicarbonate and hydroxide ions in the po
The pH of the soil governs what nutrients are available to plants. If the soil pH is above or below the recommended range (5.5 – 7.0), nutrients may not be soluble (absorbable by plants) or they may be so soluble that they become Phytotoxic. Therefore, a plant can show signs of nutrient deficiencies or toxicity even when the correct amount of fertilizer is applied to that plant.
