The 5 best pool shock treatments to clean your pool

Best Overall Pool Shock Treatment

In The Swim Pool Shock

We like this highly-rated and easy-to-use pool shock for several reasons. One, In The Swim Pool Shock is composed of calcium-hypochlorite (cal-hypo in industry lingo), so it’s a great start-up shock if you’re just opening your pool for the season. Two, it contains a high percentage of active chlorine that will zap bacteria and algae and quickly clear up pool water. And three, it’s sold in multi-packs of 1-pound doses, and a single pack is enough for 10,000 gallons of pool water.

Amazon purchaser Olga Salnikova calls it a miracle product. “I was skeptical because nothing seems to work in our above ground pool due to pump possibly been a little smaller than needed. I used tons of pool bleach and still pool would turn green,” they say. “Decided to give this a try and it’s crystal clear! I use it at night and leave the pump running. From green to clean!”

Pros

• Pre-measured doses for easy use
• Great for quick chlorine boost when fast-action cleaning is needed
• Granular formula pours directly into pool water
• Good price to quality ratio

Cons

• Not suitable for vinyl pool liners
• Not ideal for areas with hard water

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