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There are more than 20,000 known types of algae. Fortunately, only a small percentage finds its way into backyard pools. Your mission lies in keeping the microscopic invaders from colonizing and producing fully formed blooms.

How to prevent Algae:

  • Practice good chemistry maintenance. Keep the water balanced.
  • Keep the pool clean with regular vacuuming. Brush the walls, paying particular attention to corners, steps and light niches.
  • Maintain a clean filter and keep it running as long as possible, particularly during hot weather.
  • Use algaecide weekly as a preventative measure.

Black Algae:

Sometimes known as blue-green algae, it appears in pools as sporadically scattered black splotches and has become the bane of the service industry. This strain attaches itself to pool walls (primarily plaster) and sends roots deep into the finish. Couple that with the fact that it has a slippery, protective, gelatinous sheath making it highly impervious to chemical treatment, and you have a formidable foe. This insidious strain can resist most chlorine shock treatment (surviving even 40 ppm, well beyond mush shock treatments) and holds its own against most algaecides. The best way to deal with black algae involves a combination of chemicals and elbow grease. You will have to scrape and brush hard to remove the protective sheath and leave it vulnerable to chlorine.  Use Bio Guard Algae All 60.

Green Algae:

Probably the most common kind of algae, this, too, sports a gelatinous sheath protecting it from most chemical attacks. Unlike black algae, it doesn't attach itself to walls, however. Green algae causes the pea-soup green water look of the neglected pool. However, because this strain floats freely in the water, chlorine shock treatments can effectively eradicate it when used in conjunction with lots of brushing vacuuming and filter cleaning. Make sure that the pool has plenty of circulation and filtration time as well. Use Bio Guard Banish.

Mustard Algae:

This strain, also referred to as yellow algae, is a more advanced form than green or black algae in terms of its cellular structure. It will also appear on walls and in shaded areas of the pool, but employ caution when it comes to cleaning it out. If you attempt to brush yellow algae, it can flocculate and spread throughout the pool, making a bad problem worse. Aggressive chemical treatment can help, as well as increasing the pool's filtration time. Numerous algaecides that specifically target mustard algae exist today. You may try several approaches until you find the one that's right for your situation. Use Bio Guard Banish.

Pink algae:

Sometimes known as pink slime, it usually shows up at the waterline of the pool, distinguished as a pink, orange or reddish ring around the circumference. Actually a fungus rather than an algae, it can also show up around underwater lights, ladders and other fixtures. Resistant to chlorine, techs can best remove it by brushing and vacuuming.  Use Bio Guard Back-Up.

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