Over time, even well-maintained pools develop stains, mineral deposits, and discoloration that regular brushing and chemical treatment can't remove. An acid wash — also called a drain and clean — is the solution. Here's everything Miami pool owners need to know about the process.
What Is a Pool Acid Wash?
An acid wash involves draining your pool completely and applying a diluted muriatic acid solution to the plaster surface. The acid dissolves a thin layer of plaster along with embedded stains, algae roots, calcium deposits, and mineral discoloration, revealing the fresh, clean surface underneath.
When Does Your Pool Need an Acid Wash?
Persistent Staining — If you have stains that won't respond to chemical treatments, spot cleaning, or enzyme products, an acid wash is likely needed.
Calcium Scale Buildup — Miami's hard water causes calcium deposits to accumulate on pool surfaces over time, creating rough, white patches.
Algae Staining — After severe algae blooms, green or black staining can penetrate the plaster surface. An acid wash removes these deep-set stains.
General Discoloration — Years of chemical exposure, mineral deposits, and organic matter can leave your pool looking dull and dingy.
Before Resurfacing — If you're considering pool resurfacing, an acid wash can sometimes restore the surface enough to delay that larger investment.
The Acid Wash Process
Important Considerations
An acid wash removes a thin layer of plaster each time, so it can only be performed a limited number of times before resurfacing becomes necessary. Most plaster pools can handle 3-5 acid washes over their lifetime.
The process typically takes one full day and your pool will be ready to swim in within 24-48 hours after refilling and chemical balancing.
Cost of Acid Wash in Miami
Acid wash pricing varies based on pool size, condition, and the severity of staining. Contact us for a free assessment — we'll evaluate your pool and let you know whether an acid wash is the right solution or if other treatments might be more appropriate.
Contact Miami Pool Service Pros for a free acid wash estimate in Miami, Cutler Bay, Palmetto Bay, Homestead, and Kendall.