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