How to Remove Black Water Stains from Concrete Pools: A Step-by-Step Guide

* Muriatic acid

* A bucket

* A muriatic acid pump or garden sprayer

* A scrub brush

* A hose

Instructions:

1. Dilute the muriatic acid according to the package directions.

2. Pour the diluted muriatic acid into the bucket.

3. Use the muriatic acid pump or garden sprayer to apply the acid to the black water line.

4. Scrub the black water line with the scrub brush.

5. Rinse the pool thoroughly with the hose.

Repeat steps 2-5 if necessary.

Safety Precautions:

* Wear gloves and eye protection when handling muriatic acid.

* Do not mix muriatic acid with other chemicals.

* Do not use muriatic acid on metal surfaces.

* Keep muriatic acid out of the reach of children.