Balancing Your Pool After Rain: How to Get Your Water Perfect Again

Heavy rain can quickly throw your pool water out of balance. Whether you’re dealing with cloudy water, diluted chlorine, or debris after a New England storm, restoring your pool is easier than you think.

If you’re looking for pool supplies in Plaistow, NH, Derry, NH, North Reading, MA, or the surrounding communities, the experts at E-Z Test Pool Supplies & Hot Tubs are here to help with free water testing, expert advice, and the products you need to keep your pool clean, clear, and swim-ready all season long.

E-Z Test Pool Supplies & Hot Tubs proudly serves pool owners throughout Southern New Hampshire and Northeastern Massachusetts, including Plaistow, Derry, North Reading, Salem, Windham, Londonderry, Atkinson, Hampstead, Kingston, Sandown, Chester, Auburn, Manchester, Nashua, Hudson, Litchfield, Pelham, Haverhill, Methuen, Lawrence, Andover, North Andover, Reading, Wilmington, Tewksbury, Dracut, Lowell, Chelmsford, Middleton, Lynnfield, Wakefield, and many surrounding communities.

Start With a Free Pool Water Test

The first step after heavy rain is testing your pool water. A simple water test tells you exactly what needs to be adjusted.

Test for:

Free Chlorine
pH
Total Alkalinity
Stabilizer (Cyanuric Acid)

Not sure what your results mean? Bring a water sample to any E-Z Test Pool Supplies & Hot Tubs location for FREE water testing. Our trained pool professionals will analyze your water and recommend the right products to restore perfect balance.

Step 1: Balance Your pH

Heavy rainfall often lowers your pool’s pH, making the water more acidic.

Maintain a pH between 7.2 and 7.6.

Low pH? Add pH Plus
High pH? Add pH Minus

Keeping your pH in the proper range helps chlorine work efficiently while protecting your pool equipment and providing a more comfortable swimming experience.

Step 2: Restore Chlorine Levels

Rainwater dilutes chlorine and introduces contaminants, making it easier for algae and bacteria to develop.

Maintain free chlorine between 1–3 ppm.

E-Z Test Pool Supplies carries professional-grade chlorine tablets, liquid chlorine, shock treatments, and sanitizers to help restore proper sanitation quickly.

Step 3: Adjust Total Alkalinity

Total alkalinity acts as a buffer for your pH and helps prevent constant swings in water chemistry.

Maintain alkalinity between 80–120 ppm.

If your alkalinity is low, use an alkalinity increaser before making major pH adjustments.

Step 4: Shock Your Pool

Heavy rain brings pollen, dirt, leaves, and organic contaminants into your pool. Shocking your pool helps eliminate contaminants, destroy bacteria, and restore sparkling water.

If you’re unsure which shock treatment is best for your pool, our team can recommend the right product based on your free water analysis.

Step 5: Clear Cloudy Water

If your pool still appears cloudy after balancing the water chemistry:

Run your filter continuously for 24–48 hours
Backwash or clean your filter
Vacuum leaves and debris
Empty skimmer and pump baskets
Add a quality pool clarifier if needed

These simple steps will help your filtration system remove the tiny particles causing cloudy water.

Don’t Forget Your Water Level

Heavy rain can cause your pool’s water level to rise above the skimmer opening. If necessary, lower the water to its normal operating level to improve circulation and skimming performance.

Why Proper Water Balance Matters

Balanced water isn’t just about having a beautiful-looking pool. Proper chemistry also helps:

Prevent algae growth
Protect pool liners and equipment
Extend the life of pumps, heaters, and filters
Reduce skin and eye irritation
Improve sanitizer efficiency
Keep your water crystal clear all season

Visit Your Local E-Z Test Pool Supplies

Whether your pool needs a quick chemical adjustment after a thunderstorm or a complete water analysis, our experienced team is here to help.

Visit one of our convenient locations:

Plaistow, NH

26 Main Street
Plaistow, NH 03865

Derry, NH

22 Manchester Road, Suite 5
Derry, NH 03038

North Reading, MA

213 Main Street
North Reading, MA 01864

We carry everything you need to maintain a healthy swimming pool, including:

Stop by today for FREE water testing and expert advice from your local pool professionals.

Proudly Serving Southern New Hampshire & Northeastern Massachusetts

E-Z Test Pool Supplies & Hot Tubs proudly serves customers throughout:

New Hampshire: Plaistow, Derry, Salem, Windham, Londonderry, Atkinson, Hampstead, Kingston, Sandown, Chester, Auburn, Manchester, Hudson, Litchfield, Nashua, Pelham, Merrimack, Bedford, Hooksett, Raymond, Danville, East Kingston, Newton, and surrounding communities.

Massachusetts: North Reading, Reading, Wilmington, Andover, North Andover, Haverhill, Methuen, Lawrence, Dracut, Lowell, Tewksbury, Chelmsford, Middleton, Lynnfield, Wakefield, Billerica, Burlington, Stoneham, and surrounding communities.

Whether you’re searching for pool supplies near me, free pool water testing, pool chemicals, chlorine, pool shock, or expert pool care advice, E-Z Test Pool Supplies & Hot Tubs is your trusted local source for everything you need to enjoy a clean, healthy swimming pool.