Pre-dissolve the product in a clean plastic container such as a bucket. This should be done at a maximum rate of 10g of the product per 0.2 gallons/1 litre of clean water.
Stir well to ensure the product has fully dissolved.
Add the solution to the Spa whilst the pumps are on to aid distribution, preferably near to the water inlets.
The total amount of Alkalinity Increaser can be applied in one application.