Happy Hot Tubs - the best for your hot tub

Use this high quality PH Plus to increase the PH value of the water in your spa (7.2 to 7.6 is the optimum for spas).

If PH is too low, staining or corrosion may occur. PH Plus is also used to increase the Total Alkalinity of your Spa, Hot Tub or pool water. However if accurately needed to be increased, we sell Alkalinity Plus in our Shop.

Simply Test Your Hot Tub or Swimming Pool water and follow the instructions on the back of the tub to increase your PH correctly.

Great product simple to use and a really keen price. Delivered promptly as ever. ...

Rated by Mark Bradford

Just like the pHminus in the same range. Dissolves fast, easy to use container, and really water proof so never ...

Rated by Pierre Berthe

Great product super fast delivery highly recommended thanks guys ...

Rated by Lesley Barber

a++ just the job, simple to use does what it says on the tin, great customer service ...

Rated by ian cartlidge