Remove Stubborn Stains Without Full Resurfacing
Acid Washes in Cypress for stained, algae-marked, or discolored plaster that chemical balancing cannot correct
A&J Pool Plaster performs acid wash treatments on pool interiors in Cypress, removing deep stains, mineral deposits, and algae discoloration that regular brushing and chemical adjustments leave behind. If your pool surface shows brown, green, or black marks that persist after balancing the water, or if calcium buildup has created a rough, cloudy appearance, an acid wash strips away the top layer of plaster to reveal a cleaner, brighter finish underneath. This process extends the life of your existing plaster and delays the need for full resurfacing when the underlying material is still structurally sound.
The pool is drained completely, and a diluted acid solution is applied to the interior surfaces using brushes or sprayers. The acid reacts with the stained plaster, lifting discoloration and etching away a thin layer of the finish. The solution is then neutralized, rinsed thoroughly, and the pool is inspected for any areas that need additional attention. Acid washing is most effective on pools with moderate staining and plaster that still has enough thickness to tolerate the removal of surface material. If the plaster is already thin or heavily damaged, replastering is a better option.

If your pool interior looks dull or stained despite proper chemical maintenance, contact A&J Pool Plaster to determine if an acid wash will restore the appearance in Cypress.
How Acid Washing Restores Pool Appearance
Your pool is drained and allowed to dry slightly before the acid solution is mixed and applied in sections, starting at the shallow end and working toward the deep end. The acid is scrubbed into the surface to ensure even contact, and the reaction begins to lift stains and mineral deposits within minutes. Once the desired level of cleaning is achieved, the acid is neutralized with a soda ash solution, and the entire interior is rinsed multiple times to remove all residue.
After the wash, you will notice that the plaster appears brighter, stains are significantly reduced or eliminated, and the surface texture feels smoother where buildup has been removed. A&J Pool Plaster inspects the finish for any thin spots or weak areas that may need patching or monitoring before the pool is refilled. The process typically takes one day, though drying and inspection may extend the timeline slightly depending on weather.

Once the pool is refilled, you should balance the water carefully and avoid adding excessive chlorine or acid-based chemicals for the first few weeks, as the freshly exposed plaster is more porous and reactive. Keeping pH and alkalinity within recommended ranges helps prevent new staining and protects the cleaned surface.
Questions About Acid Washing Your Pool
Homeowners considering an acid wash often want to understand the risks, benefits, and how often the treatment can be repeated.
What types of stains does an acid wash remove?
Acid washing is effective against mineral stains, algae discoloration, dirt buildup, and some types of organic staining. It does not remove structural cracks, deep etching, or stains caused by metal corrosion that have penetrated beyond the plaster surface.
How often can I acid wash my pool?
Most pools can be safely acid washed two to three times over the life of the plaster, depending on the original thickness. Each wash removes a small amount of material, so repeated treatments eventually weaken the finish and require replastering.
Will an acid wash fix rough or peeling plaster?
No, an acid wash only addresses surface stains and buildup. If your plaster is peeling, cracking, or has exposed aggregate, replastering is the appropriate solution.
Is an acid wash safe for all pool finishes?
Acid washing works best on standard white plaster. Aggregate finishes such as pebble or quartz are more resistant to staining and may not respond as well to acid treatment. A&J Pool Plaster can assess your finish type and recommend the best cleaning method for your pool in Cypress.
If your pool surface is stained but the plaster is otherwise intact, an acid wash may restore the appearance and extend the time before resurfacing is needed. A&J Pool Plaster can evaluate your pool and provide an honest recommendation based on the condition of your finish. Call to schedule an assessment in Cypress.