How Much Does It Cost to Acid Wash a Pool? [2026 Data]

The cost to acid wash a pool ranges between $120 and $1,500, or an average of $450 for a standard-sized pool surface area. Maintaining a pool can be a delicate task, particularly when life gets busy and unbalanced pool chemicals lead to magnesium stains, algae buildup, and even mold. Removing algae from your pool, for example, is time-consuming on your own, but an acid wash can nip the problem in the bud.

Cost Breakdown to Acid Wash a Pool

Acid washing a pool typically involves draining the water and washing the pool surfaces with hydrochloric acid, also known as muriatic acid. The highly caustic material breaks down the top layer of plaster, concrete, gunite, or aggregate to remove a range of stains and organic growths. The acid wash typically removes calcium, magnesium, mold, and algae buildup. 

Pool Size

When you contact your local pool service team, they will typically use the size of your pool to determine the acid wash price. Acid washing costs between $0.40 and $0.60 per square foot on average, or about $0.50 depending on the cost of labor where you live.

Keep in mind that this measurement does not refer to just the pool size itself, but instead, the size of the surface area that needs cleaning. For example, a pool with four walls that is 10 feet wide, 20 feet long, and 6 feet deep will have a surface area of 560 square feet, which would cost about $280 to acid wash. Since most pools will have a shallow and deep end, the calculations can be tricky, so be sure to have a professional come out to measure properly.

Materials

The cost of the muriatic acid comes down to only about $0.06 per square foot, leaving most of the price of acid washing to tools and labor. That being said, handling muriatic acid is not a recommended DIY project, and professionals will bring the appropriate tools, protective gear, and experience to dispense it.

Labor

The majority of pool maintenance costs fall between $80 and $200 an hour of work. Acid washing a pool will take an average of four hours. Many professionals will also charge a flat fee for smaller jobs to cover travel and overhead.  

Stain Severity

The hourly cost to acid wash a pool has a lot to do with the pool's size and type of stains. Mineral and metal stains can take longer than removing algae. Exposure to iron, nickel, and calcium buildup can require far more scrubbing than natural organic materials.

Pool Surface

Acid washing a pool with muriatic acid is only possible for some exposed aggregate surfaces such as concrete, plaster, pebbles, and other large aggregates. Fiberglass and vinyl pools can only receive an acid wash from the must gentler ascorbic acid, which can be a DIY project if you choose, costing between $30 and $50 for the cleaning solution.

Tipping

Tipping your pool repair and maintenance team is becoming more common as well as a nice gesture for hard work. A tip between $10 and $20 per team member, or between 10 and 20 percent of the total bill is best.

Why You Should Hire a Pool Maintenance Pro

Labor makes up the bulk of the cost to acid wash a pool. While you can purchase the materials affordably to acid wash the pool yourself, working with those materials without experience can be dangerous. Instead, hire a local pool maintenance pro to acid wash it for you.

Here’s why it’s ideal to hire a pool maintenance pro

Working with a professional pool contractor to acid wash your pool is the better option because:

• Working with hydrochloric acid (muriatic acid) is dangerous if you’re not careful.

• A professional can recommend other treatment options if acid washing isn’t the right fit.

• Acid washing a pool can be monotonous and time-consuming.

• Pool maintenance pros may notice other issues they can repair while your pool is already drained.

If you want to DIY acid wash your pool

While you can theoretically acid wash a pool yourself by purchasing the materials, it can be dangerous if you’re not experienced. Instead, here are some elements you can handle to reduce labor costs:

• Drain the pool yourself and remove all debris.

• Refill the pool after it’s been acid-washed to avoid the cost of refilling a pool.

6 Tips for Reducing the Cost of a Pool Acid Wash

There are ways to prep your pool and refill it on your own to lower labor costs for acid washing a pool. You can also time your acid pool wash to avoid the high season. Here are six tips to keep acid pool wash costs down.

1. Avoid the high season in the late spring and summer

2. Drain the pool yourself and remove any physical debris from the walls and floor

3. Stay on top of pool maintenance and repairs to avoid additional work before the wash

4. Refill the pool on your own

5. Chat with at least three pool maintenance teams to compare prices

6. Consider packaging the acid wash when hiring a pool maintenance team

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

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