Winterising Algaecide 5 litres

A quaternary algaecide specially formulated to be more stable over the winter months. With the circulation pump running shock the pool with 1 kg of calcium hypochlorite shock per 10,000 gallons (45 cubic metres). Add 2.5 litres of winterising algaecide per 10,000 gallons (45 cubic metres) Allow to distribute through the pool