Cara's Pool School — algae

Once the treatment has been completed and the water is clear, you should always test and confirm that proper water chemistry parameters are re-established prior to swimming.

Unfortunately, algae spores are present in practically all forms of non-purified water -- including tap and source water. It takes literally millions of algae spores per fluid ounce before visible growth can be detected; so, it's entirely likely that even the most appealing swimming pool has non-visible levels of algae present at any given time. When chlorine levels are consistently maintained at proper levels, most algae strains cannot thrive and bloom. However, there are some strains that can be chlorine-resistant and still find their way into your pool (blown in like pollen, as an example). Since all forms of algae...

It is recommended to shock your pool weekly when there is regular use, to avoid any build-up of contaminants that could aid in promoting algae growth. During those times when the pool is not being used regularly, it is recommended to shock every 4 - 6 weeks, or after any potentially problematic event (heavy rains, dust storms, etc.).

Since there are many different types of algae and, in turn, countless possible treatments, it's usually best to start with the nature and color of the algae when seeking treatment advice. Shock or super-chlorination tends to be the most-utilized approach; however, the use of a powerful and all-inclusive treatment product may be preferred. Regardless of method, keeping filters clean and running the pump continuously are key to ensuring success. It's always a good idea to have a professional water test performed prior to, during, and after any algae treatment in order to ensure proper recommendations and water balance parameters are...