Pool Blocks – Copper Algaecide Size:1.5 kg Add Prevent II directly to

Add Prevent II directly to the spa water according to the dosage chart below

and a market leading 5-year warranty

Additional Information:

Complete with power supply storage and convenient cable holder

Pool Blocks – Copper Algaecide Size:1.5 kg Add Prevent II directly toPool Blocks are copper sulphate based algaecide pucks that are non foaming, and kill green, mustard and black algae that grows on the walls and on the floor of swimming pools. Initially, add 1 Pool Block puck per 25,000 L of pool water in the skimmer basket. A monthly dosage of 1 puck per 50,000 L is recommended for persistent algae growth. Adjust pool water pH and maintain between 7. 2 7. 6 during treatment. Brush walls weekly when treating black