This spa alkalinity increaser (sodium bicarbonate) raises total alkalinity to the ideal range of 80-150ppm, acting as a buffer that helps prevent extreme pH shifts. Keeping alkalinity in range is essential for stopping pH bounce and ensuring your spa water stays comfortable and properly balanced.
As a guide, 200g will raise total alkalinity by 10ppm per 10,000 litres. Treat this as a starting point rather than an exact measure, and retest your water after dosing.
