Salte Algaecide 2.5 L Crystal Water Sale! from $43.00 Qty. Add to Cart Salte Algaecide is a copper free algaecide used to treat visible algae. Use 1 litre per 40,000 litres of water, thereafter pool should be maintained with 250ml per 40,000 litres every week. Ideal for pools with salt cell chlorine generators.