Algae start with a single cell and go through several stages of growth. The cell multiplies, and although it is not visible, it can be felt on walls and steps as a slimy residue that makes surfaces slippery. During the next stage of growth, a membrane develops around the cell, making it more solid. The cell also begins to absorb nutrients. As the membrane grows, the algae become denser, and their colour becomes more dominant. At this stage, the algae produce carbon and grow rapidly in the pool by feeding off of other growing cells. The cell has reached full maturity and extreme measures will be needed to eliminate the algae.
Pink algae are usually a form of bacterial growth also seen in showers and bathtubs. In pools, they can also result from excessive phosphates. The phenomenon of pink algae is present in British Columbia because of falling ash containing phosphates from the pine needles, leaves and shrubs burned in the many forest fires. This fallout can also contain organic residue from animals and plants, which can increase the number of bacteria present in the water.
It is important to add algaecide on a daily basis to control algae spores in the water
Inadequate filtration and/or circulation is often the cause of algae growth.
The pool’s filtration system should run 24 hours a day at all times. The filter media should be thoroughly cleaned at least once a year, or after any major water problem, such as the presence of algae or metals