Why Is My Pool Foamy?Updated a month ago
Foamy pool water is usually harmless but can signal contamination or chemical imbalance. In Australia, common culprits include sunscreen, algae treatments, or high organic loads. Here’s how to diagnose and fix the fizz, plus tips to keep your pool silky smooth.
Common Causes of Foam
Organic Contaminants
Body oils, sweat, lotions, or hair products.
Pollen, algae, or decaying leaves.
Chemical Imbalance
Low calcium hardness (<150 ppm).
Overuse of algaecides (especially quaternary ammonium compounds).
High total dissolved solids (TDS) in saltwater pools.
Air in the System
Leaky pump seals or suction-side air ingress.
Step-by-Step Fixes
1. Test and Balance Water - Use our recommended pool test strips
pH: 7.2–7.6 (high pH reduces foam).
Alkalinity: 80–120 ppm (stabilises pH).
Calcium Hardness: 200–300 ppm (prevents surfactant reactions).
Chlorine: 1–3 ppm (shock if levels are low).
2. Remove Contaminants
Skim and vacuum: Remove surface debris and organic matter.
Use a clarifier: Bind tiny particles for easier filtration. Tip: drop a Water TechniX crystal tablet into your skimmer box and enjoy clear water for a month.
Enzyme treatment: Break down oils and lotions (e.g., Water TechniX Oxi Shock).
3. Reduce Algaecide Use
Avoid overdosing—follow label instructions.
4. Check for Air Leaks
Inspect pump lid O-rings, skimmer baskets, and suction lines.
Lubricate seals with silicone grease.
5. Drain and Refill (If TDS is High)
Saltwater pools: Partial drain if TDS exceeds 4,500 ppm.
Use fresh water to dilute contaminants.
NEVER FULLY DRAIN YOUR POOL.
Prevention Tips for Aussie Pools
Rinse before swimming: Encourage guests to shower off oils/lotions.
Avoid bubble baths: No kids’ toys or foam parties in the pool! (No matter what TikTok says!)
Clean filters weekly: Trapped oils can recirculate as foam. Use a filter cleaner chemical to melt away stubborn gunk.
Use defoamers: Keep a pool-safe defoaming agent on hand for emergencies.
When to Call a Pro
Foam persists despite balanced chemistry (could indicate plumbing issues).
Suspected contamination from pesticides or detergents.
Need Foam-Fighting Products?
Browse our pool chemical collection for fast-acting solutions. Pair with a reliable test kit to stay ahead of imbalances.
Final Tip: Foam is often a sign your pool needs a little TLC. Tackle contaminants early, balance wisely, and keep your water invitingly foam-free.