If you have lived in Polk County for more than one summer, you already know the drill. It is two o’clock on a scorching July afternoon, the sky turns a menacing shade of purple and within ten minutes, a classic Florida downpour is dumping inches of rain into your backyard pool.
When the skies clear and the humidity creeps right back up, it is tempting to just stare out the back window and hope for the best. But if you own a pool here in central Florida, you know that summer storms do a number on your water chemistry and equipment. Over the last 15 years, I have seen homeowners make the same honest mistakes over and over again right after a heavy storm rolls through.
Let’s walk through the five most common post-storm pool mistakes and, more importantly, how to fix them without wasting your hard-earned cash on products you do not need.
1. Over-Shocking the Pool Immediately
One of the biggest knee-jerk reactions I see after a heavy downpour is homeowners dumping massive amounts of chlorine shock into the pool. The logic seems sound: rain is dirty, the sky is stormy, let's kill everything in sight.
Here is why that backfires: rainwater is acidic and often brings down a lot of organic debris, throwing off your pH and total alkalinity. If you dump shock into a pool with a severely dropped pH, you are not only wasting expensive chemicals, but you can also damage your pool equipment, bleach your pool liner, or irritate swimmers' skin.
The Fix: Before you add a single ounce of shock, test your water. Get your pH and alkalinity balanced first. If you need a thorough green pool algae treatment, do it methodically. Test, balance, and then shock at dusk so the Florida sun does not burn off your free chlorine in twenty minutes. If balancing water chemistry feels like guesswork, our residential pool cleaning team is always happy to take the load off your shoulders.
2. Running the Pump Too Little (or at the Wrong Time)
After a storm passes, your pool water is diluted with fresh rainwater, filled with runoff from your lawn, and likely carrying airborne dust and pollen. Some homeowners think running the pump for two or three hours is enough to clear it up. Others crank it on high speed 24/7 without checking their filtration cycles.
If your pump is not running long enough, your sanitizer cannot circulate, and microscopic algae spores will start taking over within 48 hours.
The Fix: Increase your filtration run time for a day or two after a severe storm. If you normally run your variable-speed pump for 8 hours, bump it up to 10 or 12 hours until the water is crystal clear and your pressure gauge returns to normal. Good circulation is the backbone of proper weekly pool care.
3. Neglecting the Filter After a Heavy Blow
Wind and rain mean one thing for Florida yards: debris. Leaves, pine needles, Spanish moss, and dirt end up in your skimmer baskets, pump baskets, and filter elements.
A lot of pool owners empty their skimmers and think they are out of the woods. But what about what got sucked past the basket? Cartridge filters and sand filters take a massive hit during summer storms. If you ignore your filter pressure, that fine organic silt will cake up your filter elements, reducing water flow and stalling your entire circulation system.
The Fix: Check your pool’s pressure gauge right after the storm clears. If the psi is reading 8 to 10 psi higher than your clean baseline, it is time to clean your filter. Rinse off cartridge elements thoroughly, or backwash your sand or DE filter according to manufacturer guidelines. Keeping your filtration system clean is essential for effective pool chemical balancing.
4. Mismanaging Chemical Balance (Ignoring pH and Alkalinity)
Rainwater is never purely neutral. In Polk County, runoff from surrounding soil, lawns, and asphalt carries all sorts of contaminants into your pool. When large volumes of rainwater mix with your pool water, your total alkalinity usually plummets.
When alkalinity drops, your pH bounces wildly up and down. Homeowners often notice cloudy water and assume they need more chlorine, when the real culprit is a pH crash that renders their existing chlorine completely ineffective.
The Fix: Invest in a reliable liquid test kit or quality test strips, and test your water 24 hours after a major storm. Focus on getting your total alkalinity into the ideal range (typically 80–120 ppm) before adjusting your pH. Stable water chemistry protects your pool surfaces, your equipment, and your swimmers. If you want to learn more about keeping your pool water pristine year-round, check out our pool care resources page.
5. Ignoring Post-Storm Equipment and Electrical Checks
Central Florida is the lightning capital of the country. Summer storms bring intense electrical activity, power surges, and heavy winds that can wreak havoc on your pool pad.
I have visited many homeowners who noticed their pool pump timer was flashing or their salt chlorinator was throwing an error code, only to ignore it for days. By the time they call, a minor power surge has fried a control board, or a blocked pump has burned out a motor.
The Fix: Take a quick walk out to your pool equipment pad after every major storm. Make sure your timer settings are still correct (power outages often reset digital timers), check that your pump is priming properly without air locks, and listen for any unusual humming or grinding noises. If your equipment needs attention, don't wait for a breakdown.
Summary
Florida summer storms are just a part of living here in Polk County. You cannot stop the rain, but you can control how you respond to it. By avoiding these five common mistakes: over-shocking, under-circulating, neglecting your filter, ignoring pH drops, and skipping equipment checks: you will keep your pool sparkling clear, safe, and swim-ready all season long.
If you ever find yourself fighting a losing battle against a stubborn green pool or storm debris, give us a call. Whether you are in Lakeland, Winter Haven, Auburndale, Bartow, or anywhere else in Polk County, Nolan's Pool Services is here to give you honest advice and reliable care.
