$17.95 inc GST

Spa Master pH Decrease is used when the pH level in your pool or spa falls too low.

Spa Pool and Hot Tub Dose Rate: Add 5g per 1,000L for an increase of 0.1 on the pH scale.
Swimming Pool Dose Rate: Add 50g per 10,000L for an increase of 0.1 on the pH scale.
Active Constituent: Sodium Bisulphate
Note: 1kg is branded as Spa Master, 25kg comes in a Bag not a a plastic container

SKU: N/A Categories: ,


pH is a scale measurement of the acidity or alkalinity of the water. The scale runs from 0 – 14. 0 being extremely acidic and 14 is very alkaline. Neutral is at 7. Why is pH important? The pH of the human eye is about 7.4. For comfortable swimming, it is best to have your pool water at the same level. If you drop too far below 7.4, the water is too acidic and stings your eyes. If the pH rises too far above 7.4 the alkalinity irritates your eyes.

Additionally, 7.2 – 7.6 is the range in which chlorine is most effective as a sanitizer. If you pH is too high or low than the chlorine will be ineffective at eliminating the bacteria in the water.

Additional information

Weight N/A
Dimensions N/A



There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.