Can I Swim in a Pool with Low Chlorine?Updated a month ago
While a quick dip might seem tempting, swimming in a pool with low chlorine levels (below 1 ppm) is risky. Here’s why—and how to fix it safely for your next swim.
Risks of Low Chlorine
Bacteria & Viruses: Chlorine kills harmful pathogens like E. coli and salmonella. Low levels leave you exposed to infections.
Algae Growth: Green or cloudy water becomes a breeding ground for algae and insects.
Irritation: Chloramines (combined chlorine) can cause red eyes, itchy skin, and respiratory issues.
When Is It Maybe Safe?
Slightly below 1 ppm: If pH (7.2–7.6) and other chemicals are balanced, brief swimming might be okay—but rebalance ASAP.
Saltwater pools: Ensure your chlorinator is working and salt levels are within your chlorinator's operation levels.
What to Do Before Swimming
Test Chlorine: Use test strips or a digital kit (ideal range: 1–3 ppm).
Check pH: Adjust to 7.2–7.6 (chlorine works best in this range).
Look for Warning Signs:
Cloudy water
Slimy walls
Strong chemical odours (indicates chloramines, not "clean" chlorine). Use Oxi Shock to remove chloramines and "chlorine" smell.
How to Fix Low Chlorine
Shock the Pool: Use chlorine shock (double dose if algae is present).
Run the Pump: Circulate water for 6–8 hours.
Retest: Ensure levels hit 1–3 ppm before swimming.
Prevention Tips for Aussie Pools
Test daily in summer to get a baseline, then less frequently once you find the pattern (UV and heat deplete chlorine faster).
Use stabiliser (CYA): Maintain 30–50 ppm to protect chlorine from sunlight. Note: Not needed if you use stabilised pool chlorine.
Cover the pool: Reduces chlorine loss and debris.
Final Tip: When in doubt, wait it out! A little patience ensures your pool stays safe and refreshing. Need to rebalance? Grab a Chlorine Test Kit or Pool Shock and dive back in with confidence.