Eliminate Stubborn
Black Spot Algae Forever
✨ Kills black spot at the root • Results in 24–48 hours • Safe for all pool surfaces when applied correctly
🔬 What is black spot algae?
Black spot is a stubborn, chlorine-resistant algae that roots deeply into pool surfaces. It appears as small black or dark green spots that feel rough to the touch. Standard algaecides and shocking won't remove it — you need a targeted treatment.
Need the right brush for your pool surface?
Stainless steel for concrete • Nylon for fibreglass and vinyl
🛠️ Browse Maintenance Collection →🚫 Do NOT swim for 48 hours after application. Confirm chlorine 2–4 ppm and pH 7.2–7.6 before re-entry.
🧤 Wear gloves and eye protection — product contains trichloroisocyanuric acid (900g/kg). Avoid contact with skin and eyes.
🔵 For vinyl and fibreglass pools: Never apply directly to surfaces. Always use the skimmer basket method to avoid bleaching or damage.
💧 Keep out of reach of children. Store in a cool, dry place.
📞 Emergency: Poisons Information 13 11 26 | If swallowed, do NOT induce vomiting — seek medical attention immediately.
🔧 Troubleshooting — "What if…"
- ❓ Spots aren't gone after 48 hours? → Apply a second treatment. Brush affected areas again before re-applying. Heavier infestations may need two rounds 7 days apart.
- ❓ I have a vinyl pool and applied directly to spots — what now? → Rinse immediately with water. If bleaching has occurred, contact our support team for advice. Always use the skimmer method for vinyl in future.
- ❓ Black spot keeps coming back? → Check your phosphate levels. High phosphates feed black spot. Also ensure your filter is clean and running effectively. Low chlorine and poor circulation are common root causes.
- ❓ Can I swim before 48 hours? → No. Wait the full 48 hours and test water chemistry (chlorine 2–4 ppm, pH 7.2–7.6) before swimming.
⚫ Black Spot FAQs
Black spot returns when underlying conditions aren't fixed: high phosphates, low chlorine, poor circulation, or dirty filters. After treatment, maintain chlorine at 2-4 ppm, run pump daily, and test phosphate levels regularly.
When used correctly — spot-treatment for concrete/pebble, skimmer method for vinyl/fibreglass — it won't stain. Direct application on vinyl or fibreglass can cause bleaching. Always follow the surface-specific method shown above.
Dead algae turns grey/white within 24-48 hours. Brush away dead spots and vacuum to waste. Stubborn infestations may need a second application 7 days later.
Yes, Black Spot Remover works in all pool types including salt, chlorine, and magnesium pools. The application method depends on your surface type, not your sanitation system.
After dead algae is brushed and vacuumed, a standard shock treatment helps oxidise remaining organic matter and restore chlorine levels. Wait until dead algae is removed before shocking.
📱 1300 511 901 | ✉️ hello@mrpoolman.com.au
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© Mr Pool Man — evergreen instruction guide for Black Spot Remover. Always verify water chemistry before swimming.