Kleen Spa Total Alkalinity Raiser 1Kg (Increaser) for Hot Tubs, Swimming Pool...
You will need to raise the total alkalinity if the reading is below 80mg/l (ppm) The Dose rate is 30g of Alkalinity Increaser per 1,000 litres of spa water. Each dose will raise the alkalinity by approx 10 - 20 mg/l (ppm).