How to Acid Wash a Swimming Pool Without Draining
Over time pools develop stains. At a certain point you may consider acid washing your pool to freshen up your surface. Traditional acid washing is difficult, expensive, and can damage the surface of the pool. Here we give you a step-by-step guide on how to acid wash your pool without draining.

What You’ll Need

No Drān® Acid Wash

One bottle per 5,000 gallons

Brush

Regular nylon pool brush

Liquid Acid

Approximately one gallon of Muriatic acid per 1600 gallons of pool water

Petroleum Jelly

A jar of petroleum jelly for protecting metal fixtures

pH Increaser

pH increaser to rebalance pool

At a Glance

steps

hour/day

days results

8 Steps to Acid Wash without Draining

Step 1: Turn everything off

Turn off your pump system and bypass your timer to prevent the pool from turning back on.

Step 2: Protect metal fixtures

Use petroleum jelly to cover any metal fixtures (such as pool rails and pool light rims) in the pool. This will prevent them from becoming oxidized (discolored).

Step 3: Add No Drān® Acid Wash

Add one (1) bottle of No Drān® Acid Wash per 5,000 gallons of pool water.

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WARNING: Dissolve first

For colored plaster, painted fiberglass, exposed aggregate pools you will need to dissolve No Drān® Acid Wash in a bucket of water first before pouring it into the swimming pool to prevent discoloration.

TIP: Round up

Round your pool up to the nearest 5,000 gallons for dosing.

Step 4: Drop Alkalinity to Zero

Add approximately 1 gallon of Muriatic Acid for every 1,600 gallons of pool water. It’s important that the Alkalinity reaches zero (0).

Step 5: Brush

Brush the entire surface of the pool.

Step 6: Test

The next day, test your Total Alkalinity and add acid as necessary to keep the Total Alkalinity at zero (0). For every 10ppm of Total Alkalinity add 1 gallon of Muriatic Acid per 15,000 gallons of pool water.

Step 7: Repeat Steps 5 & 6 Every Day

Repeat steps 5 and 6 for every day of treatment. Start the day by testing and adding necessary acid to the pool. Then brush the entire surface.

Step 8: Rebalance

Once the stains are gone OR on the seventh (7th) day of treatment, begin to rebalance the pool slowly. Use a base demand test to estimate the amount of pH increaser you’ll need. Once the pH reaches 7.2 you may turn your pump system back on.

TIP: Dissolve first

Dissolve your pH raiser in a bucket of water and pour slowly around the pool.

TIP: Brush for every pound added

For every one (1) pound of your pH raiser, make sure to brush the pool.

Acid Washing Do's

  • Shut off the pump during treatment.
  • Round pool volume up to the nearest 5,000 gallons.
  • Test everyday and keep Total Alkalinity at zero (0).
  • Brush every day.
  • Post signs showing the pool is closed

Acid Washing Don'ts

  • Don’t run the filter or allow the pump to kick on.
  • Don’t run the process past seven (7) days.
  • Don’t get into the pool during the process.

 

Stain Prevention Tips

TIP 1: Balance with the Hamilton Index™

Lower your Total Alkalinity relative to your water hardness according to the Hamilton Index™

TIP 2: Minimize Shocking

Avoid shocking more than necessary. Shocking can lead to metals dropping out of the water and staining.

TIP 3: DIssolve before adding balancers

When using a non-liquid balancing chemical (such as pH increaser or granular acid), dissolve it first and pour it around the pool. This will minimize chances of metal staining.

TIP 4: Avoid baking soda for balancing

Switch from using baking soda to soda ash or borates to minimize chances of reacting to metals and forming stains.

TIP 5: Avoid metal algicide

Avoid using copper and silver based algicides that lead to staining.

TIP 6: Use a Stain Preventative

Consider using a preventative stain treatment such as Pool Stain Treat® to keep stains from returning.

Read More

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How to Remove Iron Stains from Swimming Pools

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How to Acid Wash a Swimming Pool Without Draining

Over time pools develop stains. At a certain point you may consider acid washing your pool to freshen up your surface. Traditional acid washing is difficult, expensive, and can damage the surface of the pool. Here we give you a step-by-step guide on how to acid wash your pool without draining.

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