Algae

Pro Pool Services system of chemical care guarantees a crystal clear, algae free pool (to the best of our abilities). Unfortunately, even when chemical levels are properly adjusted, algae will occasionally appear in a customer's pool. Algae comes in a variety of forms, and appears for a variety of reasons.

WHAT IS ALGAE?
Algae is an aquatic, plant-like organism. It is introduced to pool water as an airborne spore. There are three main types of algae: 

GREEN ALGAE, or chlorophyta,
Green algae is the most common of form of algae. It appears as a streaky, slimy buildup, first noticeable on steps, in corners, and on the plastic surfaces of skimmers and return fittings.  

YELLOW ALGAE or phaeophyta
Yellow algae, also known as brown algae or mustard algae, has the same slimy texture as green algae, but it is more difficult to remove. Yellow algae loves shade, and will often appear in covered pools. This form of algae grows in a long, streaky pattern, appearing on pool walls, in corners, and on steps and love seats.  

BLACK ALGAE or cyanophyta
Black algae is the least common form of algae, but once it blooms in a pool, it is extremely difficult to eradicate. Black algae is usually the result of chronically low chlorine levels: it is often found in leaky pools, where near-daily replenishment of the pool water is necessary. As hundreds or thousands of gallons of fill water are added to the pool, chlorine and stabilizer levels drop, allowing black algae to gain a footing.  Black algae first appears as small specks, often at the deepest part of the pool, These specks rapidly develop into large, dark blue to blue-green colored buttons, slimy to the touch and virtually impossible to brush away. Untreated, black algae will quickly spread across the entire surface of the swimming pool.