Pool Plaster Discoloration Can Be Corrected
Pool plaster discoloration is often caused by metals, organic stains, or calcium buildup. Treatment options range from chemical balancing and scrubbing to draining and resurfacing. Identifying the stain type is crucial for effective repair. Prevention involves maintaining proper water chemistry and regular cleaning.
Identifying the Stain
- Black or Gray: Often indicates manganese or iron.
- Green: Usually copper, algae, or a combination.
- Brown: Typically iron or tannins from leaves.
- Pink or Red: May be iron or a specific type of algae.
Treatment Options
- Chemical Treatment: Use stain removers specifically designed for pool plaster. Follow product instructions carefully.
- Pressure Washing: Gently pressure wash the affected areas. Avoid damaging the plaster.
- Acid Wash: A more aggressive method, requiring professional application.
- Plaster Resurfacing: The most comprehensive, but also most expensive, solution.
Comparison of Resurfacing Options
| Method | Cost (Estimate) | Duration | Longevity |
|---|---|---|---|
| Plaster Repair (Small Areas) | $300 - $800 | 1-3 days | 5-10 years |
| Partial Plaster Resurface | $2,000 - $5,000 | 3-7 days | 10-20 years |
| Full Plaster Resurface | $6,000 - $12,000+ | 7-14 days | 20-30+ years |
Preventative Measures
- Maintain proper pH, alkalinity, and calcium hardness.
- Regularly shock the pool.
- Use a phosphate remover.
- Brush the pool surfaces weekly.
- Consider a metal sequestrant.