My Pool is Yellow!

Mustard Algae is a form of green algae that is highly resistant to chlorine. Special treatments must be used to eliminate it. Mustard algae is yellowish-green in color and often looks like dirt or sand on the bottom or sides of the pool. It brushes away very easily, but returns very quickly. If left untreated, it can turn the entire pool a pea-green color in a very short time.


Chlorine Pool Treatment

  1. Read all treatment steps and chemical labels before beginning
  2. Decrease water temperature to 72 degrees if possible; if necessary, drain some water out and add new water to the pool
  3. Adjust pH to 7.2-7.4
  4. Clean the filter; backwash sand filterschange D.E., or hose off cartridge filter
  5. Raise your chlorine level to 3.0-5.0 ppm. (1 gallon of Allied Pool Shock per 10,000 gallons of pool water)
  6. Brush pool walls and bottom thoroughly
  7. Wait 15 minutes after adding chlorine to add a dose of 8 ounces every 10 minutes of Allied Pools Silver Algaecide through the skimmer until the recommended dosage of 16 ounces per 10,000 gallons of pool water is reached; if the pool does not have a skimmer, add Allied Pools Silver Algaecide below water level in front of the return by squeezing the bottle at the same rate as mentioned above
  8. Run the filter continuously (24 hours per day) for at least 72 hours after treatment or until the pool clears and subsequently 8-12 hours per day
  9. Chemically clean the filter with Kleen It, follow directions on bottle for sand, D.E., and cartridge filter
  10. 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

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′ x 32′ = 12,250
  • 18′ x 34′ = 14,300
  • 41′ x 21′ = 20,000