What Acid Washing Does
Over the years, plaster pool surfaces collect stains from minerals, metals, leaves and algae. Some stains respond to brushing and chemical treatment, but others are set deep in the surface. Acid washing removes a very thin layer of plaster, taking many of those stains with it and revealing a cleaner surface underneath.
Acid washing is often used after a pool has been left green for a long time, when stains have built up over many seasons or when a homeowner wants to refresh the look of an older plaster finish before deciding on resurfacing. For many pools it is a practical middle step that improves appearance without the time and cost of a full replaster.
The Acid Wash Process
A typical acid wash includes:
- Inspecting the plaster to confirm acid washing is a good fit
- Draining the pool safely
- Cleaning out debris and sediment
- Applying a diluted acid solution to the surface in sections
- Rinsing thoroughly and neutralizing the residue
- Refilling the pool
- Balancing the new water and restarting the equipment
Is Acid Washing Right for Your Pool?
Acid washing is not the right choice for every pool. Because it removes a layer of plaster, it should not be done too often, and it is not suitable for every surface type. Thin, worn or damaged plaster may be better served by other options. We look at the condition of your surface and explain what results are realistic.
After the wash, keeping the water balanced is important to protect the fresh surface and prevent new stains. With 20 years of experience caring for pools, we can handle the acid wash and continue with regular service to keep your pool looking its best.
Acid Washing Questions
Does acid washing require draining the pool?
Yes. The pool must be drained so the acid solution can be applied directly to the plaster surface.
Will acid washing remove every stain?
It removes many surface stains, but some deep stains may remain. We explain what to expect after inspecting your pool.
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Related reading: Removing hard water scale from pool tile and plaster