How to Acid Wash a Pool in 10 Simple Steps

If your pool is looking dull, has stubborn stains, or isn't responding to regular cleaning, it might be time for an acid wash. This process is not only effective but essential for bringing your pool back to its clean, fresh state. Before you begin, remember that acid washing requires caution and preparation to ensure safety and avoid damage to your pool.

What is Acid Washing a Pool?

Acid washing is a deep-cleaning method used to remove stains, algae, and mineral deposits by stripping a thin layer of the pool’s plaster surface. This process reveals a fresh layer of plaster beneath, just like exfoliating your skin to reveal a smoother, brighter complexion.

It’s important to note that this method is specifically for concrete or gunite pools. Acid washing should never be done on vinyl-lined or above-ground pools, as it can damage these surfaces.

When Should You Acid Wash Your Pool?

Consider acid washing your pool when:

• Stains: Chlorine, minerals, and dirt can leave persistent stains that scrubbing won't remove.
• Algae: Repeated algae blooms may leave lingering spores, which an acid wash will clear away.
• Stagnation: A stagnant pool that’s been neglected for a while may need an acid wash to restore its cleanliness.
• Repairs: If you’re patching plaster, acid washing the area first ensures no algae contaminates the new plaster.
• Wear & Tear: Faded or discolored plaster from exposure to chemicals or sunlight can be revitalized with an acid wash.

How Often Should You Acid Wash Your Pool?

Acid washing is not a regular maintenance task. It should only be done every five years unless you experience significant algae problems. Overuse can deplete your plaster, so it’s best to reserve this technique for when it’s really needed.

Acid Washing Safety Tips

Working with acid requires careful precautions. Always wear protective gear to avoid injuries. Here’s what you need:

• Respirator Mask: Protect your lungs from harmful fumes.
• Chemical-Resistant Gloves: Ensure they are strong enough to resist acid.
• Safety Goggles: Prevent eye injury, as acid can be damaging to your eyes.
• Protective Clothing: Long sleeves, pants, and acid-resistant boots are essential.

The Acid Washing Process in 10 Steps

1. Drain the Pool: Follow proper drainage instructions to avoid damage. As the water drains, scrub the surfaces with an algae brush to remove any debris and algae.

2. Prepare the Acid Mixture: Use equal parts acid (like muriatic acid or Acid Magic) and water in a watering can. Always add acid to water, never the other way around, to prevent dangerous splashing.

3. Set Up Garden Hoses: Ensure you have two hoses—one to keep the pool wet while working and another with a spray nozzle for rinsing.

4. Start the Acid Wash: Begin at the deep end. Wet the surface before applying the acid mixture in circular motions. Scrub with an acid-resistant brush. Let it sit for 30-60 seconds, then rinse.

5. Work Around the Pool: Continue the acid wash on the pool walls and other areas, scrubbing each section. Use soda ash to neutralize the acid in the rinsed areas.

6. Repeat if Necessary: If stains persist, adjust the acid mixture or apply a second round of scrubbing.

7. Rinse Thoroughly: After scrubbing each area, rinse with the spray nozzle to remove all acid residue.

8. Neutralize Acid: Add soda ash to the water collecting at the bottom to neutralize the acid.

9. Clean Up: After finishing the wash, safely store the acid and rinse all your protective gear.

10. Refill the Pool: Once the pool is thoroughly washed, refill it with fresh water.

Conclusion

Acid washing can effectively restore the beauty of your pool, but it requires careful attention to detail and proper safety precautions. Following the steps outlined here will ensure a clean and refreshed pool, ready for use. Always keep in mind the recommended frequency and be cautious when working with acid.