There are 3 different forms of Algae that can happen in a swimming pool, Mustard, Green, and Black Algae. Each one has a different cause, treatment, and prevention.

Mustard Algae:

  • Mustard Algae is a yellowish-brown colored algae that tends to grow in areas of swimming pools that have little to no circulation and seems to thrive in the shady areas of the pool. It brushes off easily but will return without the use of an algaecide. Mustard Algae can be prevented by making sure the jets can circulate all areas of the pool, maintain proper water chemistry, and weekly adding an algaecide that prevents Mustard Algae. Treating Mustard Algae can be done by following the steps below.
  1. Brush walls and floor areas affected by Mustard Algae
  2. Apply 6oz of poolife® Mustard Algae Treatment package per 15,000 gallons (apply it as close to the affected area as possible)
  3. Super chlorinate by adding 1lb poolife® TurboShock® per 10,000 gallons
  4. Continue these steps until the algae has disappeared for 24 hours
  5. Depending on which type of filter you have, backwash, or clean your filters to rid of any left contaminants

Green Algae:

  • In most cases, green pools are caused by neglect. The green color is free-floating algae, but it sometimes clings to walls as well. Improper water chemistry balance such as insufficient levels of chlorine, high pH, and high level of Cyanuric acid (CYA) can also be causes of a green pool. Green Algae can be prevented by running your filter 24 hours each day, maintaining practices such as vacuuming & brushing, maintaining proper water chemistry, and shocking the pool on a regular weekly or bi-weekly basis (shocking helps to eliminate build-ups of un-filterable contaminants such as body oils & lotions plus kills early outbreaks of algae). Treating Green Algae can be done by following the steps below.
    1. Remove any debris from the floor of the pool and brush the pool wall/floors
    2. Adjust the pH to 7.2-7.6
    3. Shock the pool with poolife® TurboShock® shock treatment at a rate of 1lb. per 10,000 gallons of water. More shock may be necessary depending on severity of the algae.
    4. Add poolife® Defend+®, poolife® Super AlgaeBomb® 60, or poolife® AlgaeKill II according to label directions.
    5. Run the filter 24 – 48 hours, brushing and vacuuming frequently.

Black Algae:

  • The only reason black algae has entered your pool is because of lack of chlorine. To prevent black algae from sneaking up on you, you must check your water quality on a regular basis. You need to test for chlorine, pH, alkalinity, calcium hardness, stabilizer, etc. Black algae shows up in areas where there is lack of water circulation. Black Algae can be prevented by maintaining proper water chemistry, brushing the pool walls on a regular basis, and insuring pool equipment is working properly. Treating Black Algae can be done by following the steps below.
  1. Adjust your pool to the correct levels. Chlorine 2.0-4.0, pH 7.2-7.6, Total Alkalinity 80-120, Calcium Hardness 200-400, Stabilizer 20-40
  2. Brush the walls aggressively because Black Algae forms a protective barrier around itself.
  3. Shock the pool using poolife® TurboShock® according to label directions. It is also a good idea to add your shock dose closest to the most affected areas
  4. Add poolife® Super AlgaeBomb® 60 according to label directions. Algaecides are specifically designed to kill and prevent algae. It’s a good idea to always have an Algaecide in the water.