With big discounts, buy 1.5Kg Aquasparkle pH Minus from Penguin Hot Tubs and Swim Spas, your number one supplier of hot tub and spa products, chemicals and balancers. AquaSPArkle Spa pH Minus contains: Sodium Hydrogen Sulphate.


All chlorine-based sanitisers become less effective at killing bacteria and viruses as the pH rises (becomes more alkaline). Acid/Alkaline conditions are measured on the pH scale which ranges from 0 - 14. Ideal bathing conditions exist at a slightly alkaline level of 7.2 to 7.6 with Total Alkalinity of 80/140 mg/l (ppm).


Ideal pH Range: 7.2 – 7.6


Test the pH of your spa water and if it is above 7.6, use AquaSPArkle Spa pH Minus to lower it. Spa pH Minus can also be used for lowering Total Alkalinity if it rises above 150mg/l (ppm).


Application Instructions


  1. Pre-dissolve the product in a clean plastic container at a maximum rate of 10g of product per 0.2 gallons (1ltr) of clean warm water. Stir well to ensure product is fully dissolved. Carefully add the resulting solution to the spa whilst the pump(s) are turned “on”. If you are reducing Total Alkalinity, pour the solution in one area in the middle of the spa.
  2. After a minimum of 30 minutes, recheck the pH/Total Alkalinity level and if necessary, repeat the treatment until the ideal pH/Total Alkalinity is established.


*Product packaging may differ from picture shown.

AquaSPArkle Spa pH Minus 1.5kg

  • Please do not hesitate to contact us directly on 0800 112 3886 or alternatively email office@penguinspas.com where we will be more than happy to answer your questions and point you in the right direction.