Fill a 5-gallon bucket with pool water. Put on gloves to protect your hands. Pour a granulated calcium hypochlorite-based shock treatment into the bucket slowly. This product sharply increases the chlorine content and kills the algae. It's important to add the chemicals to the water, not the other way around. Stir the solution well and agitate it for at least 60 seconds until the shock treatment dissolves.
Turn on the pool's filtration system and pour the solution slowly in front of the return line fitting. All of the solution should be carried out into the pool water, rather than settle on the floor. If there are undissolved granules at the bottom of the bucket, add more pool water, agitate and slowly pour into the pool.
Keep the pump on to continuously circulate the water.
Clean the walls of the pool with a stiff-bristled brush. Work from one end to the other until the entire pool is scrubbed.
Vacuum the floor of the pool. Work from the outside of the pool in circles until you reach the very center.
Pour a commercial algaecide formulated to kill pink algae into the pool. Polymer algaecides or silver algaecides such as Pooltrine 60 contain the most effective antibacterial properties. Follow the manufacturer's instructions.
Put sodium bromide tablets in a chemical feeder to dissolve in the water. This is effective when done in addition to shock treating the pool. Follow the label directions. Bromine effectively kills pink algae and other harmful contaminants.
Turn off the filter. Make a diluted bleach solution in a bucket. Use 1 cup of bleach per every gallon of water. Dip a sponge into the solution and wipe down the filter completely. Backwash it.
Rinse all pool equipment and swimsuits in the diluted bleach solution to remove traces of the algae.
Brush and vacuum the pool every day. If the chlorine level falls below 5ppm, add more.