Acid Washing an Inground Pool Without Draining: A Comprehensive Guide

Acid washing an inground pool without draining the water involves several steps to ensure proper and safe cleaning. Here are the steps you can follow:

1. Safety Precautions:

- Wear protective gear, including goggles, gloves, and a respirator or mask, to protect yourself from acid fumes.

- Ensure adequate ventilation around the pool area to prevent the buildup of acid fumes.

- Keep children and pets away from the pool area during the process.

2. Test Pool Water:

- Use a pool water test kit to measure the pH, alkalinity, and calcium hardness levels of the water.

- Adjust the pH level of the water to be within the ideal range of 7.2 to 7.6 before proceeding with the acid wash.

3. Calculate Acid Amount:

- Determine the amount of muriatic acid (hydrochloric acid) needed based on the pool's volume and the pH level.

- Follow the manufacturer's instructions for the correct dosage and dilution of the acid.

4. Prepare Pool Surface:

- Remove debris and dirt from the pool surfaces, including walls, floor, and steps, using a pool brush or vacuum.

- This ensures that the acid solution effectively reaches all areas of the pool.

5. Add Acid Solution:

- Slowly add the calculated amount of muriatic acid to the pool water while stirring gently to distribute it throughout.

- Pour the acid directly into the pool, avoiding contact with pool surfaces and equipment.

6. Circulate Pool Water:

- Run the pool pump continuously during the acid wash process to circulate the acid solution and ensure even distribution.

- This helps to remove stains and scaling from all surfaces.

7. Monitor pH Level:

- Check the pH level of the pool water periodically during the acid wash process using the pool water test kit.

- Adjust the pH level by adding a pH decreaser or increaser as needed to keep it within the ideal range.

8. Brush Pool Surfaces:

- Use a soft pool brush to gently scrub the pool walls and floor to remove any loose debris and help the acid solution reach all areas.

9. Allow Acid to Work:

- Let the acid solution circulate and work for several hours or overnight, depending on the condition of the pool.

- The acid will dissolve stains, scale, and mineral deposits.

10. Rinse Pool:

- After the desired time, neutralize the acid solution by adjusting the pH level back to the ideal range.

- Rinse the pool thoroughly by running the pump and refilling the pool with fresh water if needed.

11. Rebalance Water Chemistry:

- Test the pool water again and make any necessary adjustments to restore the water balance, including chlorine levels, pH, alkalinity, and calcium hardness.

12. Wait Before Swimming:

- Wait at least 24 hours after completing the acid wash process and rebalancing the water chemistry before allowing swimming in the pool.

Note: Acid washing should be done cautiously, and it's recommended to consult with a pool professional or refer to specific guidelines for your pool type and materials to ensure proper and safe procedures.