My Pool is Black!

Black Algae usually forms in cracks and crevices on pool surfaces. It forms a skeletal growth on top to protect itself, which normal levels of chlorine cannot defeat. To treat Black algae the pool owner must brush vigorously before applying chemical treatment in order to eliminate the protective coating.

Chlorine Pool Treatment

  1. Read all treatment steps and chemical labels before beginning.
  2. Clean the filter. Backwash sand filters, change D.E., or hose off cartridge filter.
  3. Shut pump off.
  4. Adjust pH to 7.2-7.4.
  5. Add a dose of 16 ounces of Allied Pools Silver Algaecide directly to the pool until the recommended dosage of 16 ounces per 10,000 gallons of pool water is reached.
  6. Brush pool walls and bottom vigorously. Allow the pool to sit 4 to 6 hours without circulation.
  7. Allow the pool to sit overnight with the pump off.
  8. Next morning, vacuum to waste if possible.
  9. Repeat chemical treatment, if necessary.
  10. Chemically clean the filter with Kleen It. Follow directions on bottle for sand, D.E., and cartridge filters.
  11. Add a maintenance dose of 4 ounces (per 10,000 gallons of pool water) Allied Pools Super Algaecide 600 5 to 7 days after treatment and each week going forward.

Biguanide Pool Treatment

  1. Read all treatment steps and chemical labels before beginning.
  2. Clean the filter. Backwash sand filters, change D.E., or hose off cartridge filter.
  3. Adjust pH to the proper range. (7.2-7.6)
  4. Brush pool walls and bottom vigorously.
  5. Add 2 gallons of Biguanide Shock per 10,000 gallons of pool water.
  6. Add Biguanide up to 50 ppm.
  7. Add an initial dose of 16 ounces of Biguanide Algaecide per 10,000 gallons of pool water.
  8. Allow the pool to sit overnight with the pump off.
  9. Next morning, vacuum to waste if possible.
  10. Chemically clean the filter with Kleen It. Follow directions on bottle for sand, D.E., and cartridge filters.
  11. Add a maintenance dose of 2 ounces of Biguanide Algaecide per 10,000 gallons of pool water each week going forward and after heavy rainfalls.
  12. Add a maintenance dose of 1 gallon of Biguanide Shock per 10,000 gallons of pool water each month going forward and after heavy rainfalls.

Flat Pool Gallonage (48″ Pool)

  • 12′ = 3,100 16′ = 5,500 18′ = 6,700 21′ = 9,000 24′ = 12,000 28′ = 16,500
  • 12′ X 24′ = 7,000 16′ X 24′ = 9,000 16′X32′ = 12,250 18′ X 34′ = 14,300 41′ X 21′ = 20,000