Granular blackspot killer

Zephyr Pool Supplies Verified independent store

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Controls blackspot algae in pebblecrete, plaster and tiled pools Slow release & Metal free Contains: 900g/kg Trichloroisocyanuric Acid Description: Dosage: 1Kg treats 50,000L of po ol water 1. Adjust pH to 7.2 2. Place product directly onto the affected area and Wait 24 - 36 hours 3. Scrub with a wire brush if necessary. Dosage rates indicated are a guide only. Please refer to the label on the bottle for further instructions. 4. Scrub algae with algae brush first. 5. Remove all automatic pool cleaners prior to application. 6. Place Blackspot Treatment directly onto the black spots and Wait 24-36 hours. 7. Scrub again with stainless steel brush if necessary. 8. Repeat process until algae is removed. We recommend algaecide chemicals should be used regularly, especially when you shock your pool. Always shock your pool first and allow the chlorine levels to come back to normal before adding algaecide. Always read the instructions carefully, and add the correct amount of algaecide to different places around the pool while the pump is running. Show more