How to Acid Wash a Swimming Pool

Acid washing is a process used to remove stains and deposits from a swimming pool's surface. This process involves using a mixture of water and muriatic acid to etch the surface and remove any stains, algae, and other impurities. Here are the steps to acid wash a swimming pool:

1. Prepare the pool: Drain the pool until the water level is below the stains or deposits you wish to remove. Remove any debris, such as leaves or branches, from the bottom of the pool. Cover any surrounding plants, grass, or other outdoor furniture with plastic sheeting to protect them from the acid.

2. Safety precautions: Wear personal protective equipment, including gloves, safety glasses, and a respirator mask, to protect yourself from the acid's fumes and splashes. Keep a bucket of baking soda nearby in case of accidental spills or splashes.

3. Mix the acid: In a large plastic container, mix one part muriatic acid to ten parts water. Always add the acid to the water, never the other way around. Stir the mixture with a plastic spoon or stirrer.

4. Apply the acid mixture: Starting from the shallow end of the pool, pour the acid mixture onto the surface and use a pool brush to spread it evenly. Work in small sections, so the acid doesn't dry before you can brush it. Wait for the acid to fizz and bubble as it reacts with the stains and deposits.

5. Rinse the pool: After 10 to 15 minutes, use a hose to rinse the acid off the surface and into the drain. Repeat the process if necessary to remove all the stains and deposits. Make sure to neutralize the acid with soda ash or baking soda before draining the pool.

6. Clean up: Once the acid washing is complete, dispose of the plastic sheeting and any used brushes or tools properly. Neutralize the acid with baking soda or soda ash before disposing of it.

7. Refill the pool: After cleaning up, refill the pool with water and balance the chemicals before using it.

It is recommended to hire a professional pool service to do the acid washing. Acid washing can damage the pool's surface if done improperly, and it can also be dangerous if you don't take the proper safety precautions.