Pool Acid Washing & Deep Cleaning
Over time, pool surfaces accumulate mineral scale, algae stains, and chemical deposits that regular brushing and chemical treatments cannot remove. Acid washing is a professional deep-cleaning process that strips away these buildups and restores your pool's interior surface to a clean, bright finish. Sapphire Pool Solutions provides expert acid washing services throughout the Phoenix metro area, and our 25+ years of experience means we know exactly how to clean your surface safely and effectively.
When Your Pool Needs Acid Washing
Common signs that your pool is due for an acid wash include persistent staining that does not respond to chemical treatments, a rough or gritty surface texture, visible mineral scale lines at the waterline, and a general dull or discolored appearance. Arizona's hard water is particularly prone to calcium scale buildup, and most plaster pools in the Phoenix area benefit from an acid wash every 3 to 5 years to maintain their appearance and surface smoothness. If you notice that your pool chemicals are harder to balance or your surface feels like sandpaper, it is likely time for professional cleaning.
Our Acid Washing Process
The process begins with completely draining the pool and allowing the surface to dry. We then apply a controlled muriatic acid solution section by section, scrubbing the surface to dissolve stains and scale deposits. The solution is neutralized and properly disposed of according to local regulations. The entire process typically takes one day for a standard residential pool. We inspect the surface throughout the process to ensure even cleaning without over-etching. Our technicians control the acid concentration and contact time carefully based on the surface condition and finish type.
Types of Stains We Remove
Different stains require different approaches. Calcium scale (white crusty deposits) is the most common issue in Arizona pools and responds well to acid washing. Iron stains from well water leave rust-colored marks on plaster surfaces. Copper stains from heater corrosion or algaecides create blue-green discoloration. Organic stains from leaves, berries, and algae leave brown or green marks. We identify the stain type before treatment and use the appropriate acid concentration and technique for each situation.
Acid Washing Results & Benefits
A professional acid wash restores your pool's visual appeal, improves water chemistry balance, and extends the life of your plaster surface. The results are immediately visible: stains and discoloration are removed, the surface feels smooth again, and the water looks noticeably cleaner and brighter after refilling. A clean surface also reduces chemical consumption because there are fewer mineral deposits interfering with your water chemistry. For pools with severely deteriorated surfaces, we may recommend resurfacing instead of acid washing to achieve the best long-term result.
Chlorine Wash vs. Acid Wash
For pools with organic staining from algae, leaves, or biological growth, a chlorine wash may be a better option than an acid wash. A chlorine wash uses a concentrated bleach solution to kill and remove organic material without etching the plaster surface. We often recommend a combination approach: a chlorine wash to address organic stains followed by a light acid wash to remove mineral deposits. During our initial assessment, we evaluate your pool's surface and stains to recommend the most effective cleaning method.
Frequently Asked Questions
- How often should a pool be acid washed?
- Most plaster pools in the Phoenix area benefit from an acid wash every 3 to 5 years. Arizona's hard water causes calcium and mineral buildup faster than other regions, making periodic acid washing particularly important for maintaining surface quality.
- Will acid washing damage my pool surface?
- When performed by an experienced professional, acid washing is safe for plaster and exposed aggregate surfaces. We control the acid concentration and contact time carefully to remove stains without over-etching. We do not recommend acid washing on pebble finishes — we use alternative methods for those surfaces.
- How long does acid washing take?
- Most residential pool acid washes are completed in a single day. The pool needs to be drained beforehand, which takes 8 to 12 hours, and refilling takes a similar time depending on water pressure. Total turnaround from drain to swim-ready is typically 2 to 3 days.
- What is the difference between acid washing and resurfacing?
- Acid washing removes surface stains and mineral deposits without adding new material — it cleans the existing surface. Resurfacing involves applying a completely new layer of plaster, quartz, or pebble finish over the existing surface. If your plaster is thin, cracking, or severely deteriorated, resurfacing is the better long-term solution.
Service Areas
We provide acid washing services throughout the Greater Phoenix Metropolitan Area, including:
- Anthem, AZ
- Phoenix, AZ
- Scottsdale, AZ
- Mesa, AZ
- Cave Creek, AZ
- Tempe, AZ
- Chandler, AZ
- Gilbert, AZ
- Glendale, AZ
- Peoria, AZ
- Surprise, AZ
- Paradise Valley, AZ
- Fountain Hills, AZ
- Carefree, AZ