Pool chemicals are essential for keeping your water clean and safe to swim in. But handled incorrectly, they can cause real harm. This guide covers the most common pool chemical safety questions so you know how to use, store and handle them with confidence.
Can Pool Chemicals Harm You?
Pool chemicals such as chlorine, muriatic acid and cyanuric acid are designed to kill bacteria and algae. Used correctly, they are safe. Used incorrectly, they can cause the following:
Swallowing pool water
Overchlorinated water can cause nausea, vomiting, diarrhoea and headaches if swallowed
Skin and eye contact
Direct contact with pool chemicals causes irritation and pain. Flush affected areas with clean water for 15 minutes and seek medical attention if severe
Inhaling fumes
Chemical fumes cause coughing, wheezing and watery eyes. Move to fresh air immediately and seek help if symptoms persist
What Happens If You Swim in an Imbalanced Pool?
A well-balanced pool should be free of bacteria and algae and safe to swim in. If pH or chlorine levels are off, you may experience skin irritation, redness and burning. In severe cases, chemical burns or breathing difficulty are possible. If you experience any of these symptoms after swimming, seek medical attention promptly.
Note: a strong chlorine smell is not a sign of a clean pool. It means you have too many chloramines, which indicates the water is out of balance and needs attention.
What Happens If You Breathe in Pool Shock?
Inhaling pool shock is potentially dangerous. It can burn your airways, cause difficulty breathing, coughing and throat irritation. If this happens, leave the area immediately, move to fresh air and seek medical assistance. Always handle pool shock outdoors or in a well-ventilated area.
What You Should Know About Pool Chemicals
Water that is not properly sanitised or has an unstable pH can become a breeding ground for E. coli, Giardia and norovirus. Keeping your pool safe means monitoring chlorine levels and pH consistently, especially during periods of heavy use.
Chlorine is the most common pool chemical, used to kill bacteria and algae. If you are sensitive to chlorine, a saltwater system generates chlorine from salt and is generally gentler on the skin. Other essential chemicals include pH balancers, algaecides and clarifiers. Always read labels carefully, follow storage and dosing instructions, and never mix chemicals.
How to Stay Safe Around Pool Chemicals
As a pool owner:
Test your water regularly
Use test kits frequently to keep chlorine and pH levels in range, especially during summer and heavy use periods.
Store chemicals correctly
Keep all pool chemicals away from direct sunlight, moisture and heat in a secure, temperature-controlled location. Never store different chemicals together.
Wear protective equipment
Gloves, goggles and a face mask are essential when handling pool chemicals. Never handle them in an enclosed space.
Run your filter for the right amount of time
Filtration duration should reflect the season and how frequently the pool is used. Under-filtering leads to imbalanced water regardless of chemical dosing.
Ensure ventilation for indoor pools and spas
Chemical fumes accumulate in enclosed spaces. Adequate airflow is essential for indoor pools and hot tubs.
As a swimmer:
Shower before and after swimming
Wear swimming goggles to protect your eyes
Do not swim if you have diarrhoea
Avoid swallowing pool water
