Many factors work against the cleanliness of your pool. Sunlight breaks down the chlorine, causing the water to lose up to 5 ppm of chlorine in one sunny afternoon. Swimmers unintentionally release bacteria and contaminants like sweat, makeup and sunscreen. And storms can bring dust, pollen, leaves and algae spores. Shocking is one of the best ways to protect your pool water and keep it crystal clear.
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In ideal circumstances, shocking your pool once a week will keep it looking clean and clear, but heavy rainfall, signs of algae, heavy use or long periods of sunny weather may require more frequent treatment. Sundown is the best time to shock your pool, so the chlorine can work to restore water clarity without the sun’s harsh ultraviolet rays. Brush the pool floor and walls to help expose settled contaminants to the chlorine.
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First, brush the floor and walls of your pool to loosen the algae and break down the cells’ outer membrane to allow the chemicals to penetrate. Next, shock the pool with an HTH shock treatment, following label instructions. After 24 hours, use an HTH algaecide to treat the effected area, then brush the pool again. Keep the pump running overnight and continue to use the algaecide once a week to prevent future growth.
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