A 2 Pack of AlgaeFree Pool Blocks 600g Will Treat Your Pool For 2 Months!

2 pack AlgaeFree Pool Blocks 600g are an all season algaecide. This product is an extra strength, slow release solid tablet algaecide suitable for chlorine and salt water pools. This product eliminates all forms of green, mustard and blackspot algae to deliver clean, sparkly water.

Pool Blocks are used by commercial pools, hotels and by local governments to control algae in water. This product contains more than twice the active ingredient of most standard competitor algaecide products to ensure the longest possible treatment period. Using Pool Blocks regularly prevents blackspot algae and keeps your pool blue when chlorine or salt levels drop.


C$34.95 Regular Price
C$29.95Sale Price
    • Blackspot, Mustard & Green Algae Killer
    • Eliminates algae from walls, grouting & steps
    • Reduce chlorine consumption
    • Handy monthly slow release tablet
    • Ideal for salt or chlorine pools
    • Long life algaecide for summer or winter


    • Initial dose – place one pool block per 25,000 litres of pool water in the wire basket when the pump is running
    • If algae persists, a monthly maintenance dose of one block per 50,000 L or ½ block per 25,000
    • Adjust pool water pH and maintain between 7.2-7.6 during treatment
    • Brush walls weekly when treating blackspot algae
    • Use in conjunction with chlorine or an approved bactericide when swimming
    • Do not contaminate irrigation or drink water supplies or aquatic habitats by cleaning of equipment or disposal of waste
    • Do not reuse empty container