Surfaces Restored to Their Original Condition

Acid Wash in Gilbert for pools with visible staining and embedded algae

Gilbert Pool Services performs acid wash treatments for plaster pool surfaces showing persistent discoloration that regular cleaning no longer addresses. This process removes the top microscopic layer of plaster, taking embedded stains, algae residue, and mineral buildup with it. Pools that have turned gray or developed stubborn brown stains regain the original white or colored finish that was visible when the plaster was new.

The treatment involves draining the pool completely, applying a controlled acid solution to the plaster surface, and scrubbing to lift stains that have penetrated beyond the reach of standard brushing or chemical treatment. The acid etches away the discolored layer without compromising the structural integrity of the plaster when applied correctly.

Schedule a pool inspection to determine if acid washing will address your current surface condition.

The acid wash process starts with complete drainage and surface preparation to ensure the solution contacts the plaster evenly. Muriatic acid is diluted to the appropriate concentration based on stain severity and plaster age, then applied in controlled sections to prevent over-etching. Each section is scrubbed with acid-resistant brushes while the solution is active, then neutralized and rinsed thoroughly before the next area is treated.

After the wash is complete, you'll see the plaster return to a color much closer to its original shade, with dark algae shadows and rust-colored metal stains visibly gone. The surface feels slightly smoother because the rough, stained outer layer has been removed, and the pool water remains clearer longer because there are fewer surface irregularities for contaminants to cling to.



Acid washing extends the life of plaster finishes by removing buildup that can accelerate deterioration, but it does remove a small amount of material each time. Most plaster surfaces can handle this treatment two to three times over their lifespan before replastering becomes necessary, so timing the wash appropriately based on stain severity rather than scheduling it routinely helps preserve the finish longer.

Pool owners in Gilbert often ask about this service before scheduling treatment for heavily stained surfaces.

What types of stains does acid washing remove?

The process eliminates algae stains, mineral deposits from hard water, rust stains from metal objects or corroded fittings, and general discoloration from years of chemical exposure and organic debris.

How long does the pool need to remain empty?

Most residential pools remain drained for one to two days depending on surface area and stain severity, allowing time for the acid application, scrubbing, neutralization, rinsing, and a brief drying period before refilling begins.

Will acid washing damage older plaster?

When plaster is already thin or showing structural cracks, acid washing can worsen those weak points, so a surface inspection beforehand determines whether the plaster is thick enough to withstand material removal or if replastering is the better option.

How does Gilbert's hard water affect how often pools need acid washing?

High mineral content in local water accelerates calcium scale buildup and staining on plaster surfaces, which means pools in this area often require acid washing sooner than those in regions with softer water.

What happens to the pool after the acid wash is complete?

The pool is refilled with fresh water, rebalanced chemically with startup chemicals appropriate for newly exposed plaster, and circulated for at least 24 hours before swimming resumes to ensure all acid residue is fully diluted and pH is stabilized.

Gilbert Pool Services evaluates plaster thickness and stain depth before recommending acid wash treatment to ensure the finish can handle the process. Request a surface assessment to confirm whether acid washing or an alternative approach is appropriate for your pool's current condition.