Free Chlorine in Swimming Pools
The term "Free Chlorine" in regard to swimming pools
is the amount of chlorine in pool water that is available and active to sanitize and kill bacteria, viruses, and algae.
What is Free Chlorine?
Unlike combined chlorine (chlorine that has already reacted with contaminants), free chlorine remains active and ready to neutralize harmful microorganisms and keep pool water safe and clean.
Why is Free Chlorine Important?
- Sanitization: Eliminates harmful bacteria, viruses, and algae.
- Water Clarity: Maintains clear and safe swimming conditions.
- Prevention: Protects against algae blooms and cloudy water.
Recommended Free Chlorine Levels
The ideal free chlorine level depends on the stabilizer (CYA) concentration:
- Without CYA: 1-3 ppm
- With CYA: Maintain 5-7% of the CYA level for optimal results.
How to Test Free Chlorine
- Use a digital tester, test strips, or a liquid drop kit.
- Compare the results to the recommended levels for your pool type.
How to Adjust Free Chlorine
To maintain proper free chlorine levels:
- To Raise Levels: Add chlorine products such as liquid chlorine, calcium hypochlorite, or trichlor tablets.
- To Lower Levels: Allow sunlight to naturally reduce chlorine levels or dilute the pool water by adding fresh water.
Related Terms
<div class="dynamic-checkout__content" id="dynamic-checkout-cart" data-shopify="dynamic-checkout-cart"> <shopify-accelerated-checkout-cart wallet-configs="[{"name":"shop_pay","wallet_params":{"shopId":26521534554,"merchantName":"AquaDoc"}},{"name":"amazon_pay","wallet_params":{"checkoutLanguage":"en_US","ledgerCurrency":"USD","placement":"Cart","sandbox":false,"merchantId":"A2HNGNTX6KDCDX","productType":"PayAndShip","design":"C0002"}},{"name":"paypal","wallet_params":{"shopId":26521534554,"countryCode":"US","merchantName":"AquaDoc","phoneRequired":false,"companyRequired":false,"shippingType":"shipping","shopifyPaymentsEnabled":true,"hasManagedSellingPlanState":null,"requiresBillingAgreement":false,"merchantId":"BYL4VLZSTTEWG","sdkUrl":"https://www.paypal.com/sdk/js?components=buttons\u0026commit=false\u0026currency=USD\u0026locale=en_US\u0026client-id=AfUEYT7nO4BwZQERn9Vym5TbHAG08ptiKa9gm8OARBYgoqiAJIjllRjeIMI4g294KAH1JdTnkzubt1fr\u0026merchant-id=BYL4VLZSTTEWG\u0026intent=authorize"}}]" access-token="4e4619d038f47707f8ef9220956a11fe" buyer-country="US" buyer-locale="en" buyer-currency="USD" shop-id="26521534554" cart-id="d6afe243894e8aa19a2e17aa7b38a73c" > <div class="wallet-button-wrapper"> <ul class='wallet-cart-grid wallet-cart-grid--skeleton' role="list" data-shopify-buttoncontainer="true"> <li data-testid='grid-cell' class='wallet-cart-button-container'><div class='wallet-cart-button wallet-cart-button__skeleton' role='button' disabled aria-hidden='true'> </div></li><li data-testid='grid-cell' class='wallet-cart-button-container'><div class='wallet-cart-button wallet-cart-button__skeleton' role='button' disabled aria-hidden='true'> </div></li><li data-testid='grid-cell' class='wallet-cart-button-container'><div class='wallet-cart-button wallet-cart-button__skeleton' role='button' disabled aria-hidden='true'> </div></li> </ul> </div> </shopify-accelerated-checkout-cart> <small id="shopify-buyer-consent" class="hidden" aria-hidden="true"> One or more of the items in your cart is a recurring or deferred purchase. By continuing, I agree to the <span id="shopify-subscription-policy-button">cancellation policy</span> and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. </small> </div>