7 Common Swimming Pool Myths: Fact or Fiction
We’ve all grown up hearing swimming pool “rules” and warnings that sound like gospel—but how many of them are actually true? Whether it’s your mom warning you about swimming after lunch or your friend swearing that chlorine turns your hair green, it’s time to separate fact from fiction.
Below, we’re breaking down seven of the most common swimming pool myths and deciding if they’re fact or fiction. This will help you keep your pool safe, clean, and rumor-free!
Myth #1: Wait an hour after eating before swimming, or you’ll get sick.
You probably heard from family and friends as a child that you had to wait an hour after eating to swim because you’ll get a cramp. In fact, you may have even said it to your own children!
Truth: Partially True
Your body redirects blood flow to your stomach to help with digestion. This can slightly reduce the amount of blood available to your muscles. In turn, this might make cramps more likely if you’re swimming strenuously right after a heavy meal.
For most people, though, it’s not dangerous.
Pro Tip:
Eat a lighter meal and ease into the water instead of jumping straight into intense laps.
Myth #2: If you smell chlorine, there’s too much in the pool.
Truth: False
That strong “pool smell” isn’t chlorine. It’s chloramines. These form when chlorine binds with contaminants like sweat and urine. A strong smell means the chlorine has already been used up and the water actually needs more chlorine. Generally it’s time to shock the pool.
Pro Tip:
Keep your pool chemistry balanced with regular testing and shock treatments when needed.
Myth #3: Chlorine turns blonde hair green.
Truth: False
This one’s a classic, but chlorine isn’t the culprit. The greenish tint sometimes seen in blonde or light hair is actually caused by copper.
Some algaecides or plumbing materials introduce copper into the pool, and when oxidized, it can bind to hair proteins.
Pro Tip:
Rinse your hair before swimming and apply a leave-in conditioner. If discoloration happens, use a clarifying shampoo.
Myth #4: Chlorine burns your eyes.
Truth: False
Eye irritation isn’t due to chlorine. It’s because your pool water isn’t balanced. Specifically, an incorrect pH level can cause burning or redness. Keep your pH between 7.2 and 7.6 to prevent discomfort.
Pro Tip:
Test your pool’s pH weekly to avoid eye and skin irritation.
Myth #5: Pee in the pool, and it’ll turn blue!
Truth: 100% False (but fun to believe)
There’s no magical blue dye that reveals you peed in the pool, so you can relax. While a chemical could be made to react with urine, it would also likely react with other things in the water. This myth is just a great way to keep kids honest!
Pro Tip:
Keep the legend alive. If it helps prevent pool accidents, we’re on board.
Myth #6: Saltwater pools don’t contain chlorine.
Truth: False
Saltwater pools generate chlorine from salt through a process called electrolysis. The result is a gentler form of chlorination, but it’s still chlorine—and regular maintenance is still required, including shocking the pool as needed.
Pro Tip:
Even saltwater pools need testing and care. Don’t skip your weekly maintenance.
Myth #7: If the water looks clear, it must be clean.
Truth: False
Clear water can still contain harmful bacteria or chemical imbalances. Don’t rely on appearances. Rely on regular water testing.
Pro Tip:
Test your water weekly (or more often during heavy use) for chlorine levels, pH, and total alkalinity. Don’t forget that you can bring us a water sample, and we’ll test it for free!
Know the Facts on Swimming Pool Myths
While some pool legends are just old-fashioned fun, understanding the real science behind your pool is essential for safety and enjoyment.
If you ever have questions or need help maintaining your pool, reach out to a local pool professional or stop by your nearest Fiesta Pools and Spas location. We’re always happy to help with expert advice, free water testing, pool chemicals, or just to chat!
