Green water usually means algae, and algae grows fast in warm weather.
Common causes
Low chlorine, poor circulation, a dirty filter and heavy rain are the usual suspects.
Most green pools are clear again within a few days of steady treatment.
The cleanup
We test the water, shock it, brush the walls, vacuum the floor and run the filter until the water is clear.
Keeping it clear
Regular testing and a clean filter are the simplest ways to stop algae coming back.
