Black algae

What is it?

Black algae are single-celled organisms that grow in large colonies. They contain chlorophyll like other algae, but they also contain compounds that mask the green colour. It forms in cracks and crevices on pool surfaces (especially plaster finishes) and can grow somewhat protected from the surrounding environment due to the formation of a protective layer on the outside of the cell. This makes black algae more difficult to treat and it is somewhat resistant to normal chlorine levels.
 

Solutions

• Use Erase®​ as it kills all types of swimming pool algae.

1. Maintain a sanitizer​ residual of 1-3ppm.
2. Do an initial and weekly application of a preventative algicide with Banish®.
3. Shock​ routinely with Smart Shock.
4. Make sure there is adequate circulation and filtration.
5. Brushing​ surfaces is vital.