How to Flock a Pool

Written by ian kelly
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How to Flock a Pool
Flock you pool regularly to keep it crystal clear. (Jupiterimages/Comstock/Getty Images)

A cloudy pool is caused by algae and minute particles of suspended debris that circulate freely through the pool filter. Restore the clear sparkling mountain-stream appearance of your pool by settling these particles with one of the patented flocking chemicals available from your local pool outlet---but do not flock you pool during chemical shock treatment. Stabilise the pool pH first and remove loose surface and underwater debris with a skimming net and pool vacuum before using flock removal chemicals.

Skill level:

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Things you need

  • Long-handled pool brush
  • Pool flocking chemical
  • Pool vacuum attachment

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  1. 1

    Loosen clinging algae by brushing the side and bottom of your pool with a long handled pool brush.

  2. 2

    Apply the pool flocking chemical by following the directions printed on the plastic bottle; this is usually at a rate of 236ml per 10,000 gallons of water. Pour the chemical slowly into the skimmer while the pump is running in the circulating mode.

  3. 3

    Leave the pump on for two hours to allow the chemical to mix thoroughly with the pool water.

  4. 4

    Turn the pump off and allow enough time for the debris to settle; this could take anywhere from 12 to 48 hours, but usually works overnight.

  5. 5

    Switch the pump to the "waste" setting and vacuum the pool thoroughly with a pool vacuum attachment after the debris has settled.

  6. 6

    Continue vacuuming, with the pump set to the waste setting, daily for the next five to seven days to allow the chemical action to settle any remaining water-born particles.

  7. 7

    Top up the pool with a garden hose once the water is crystal clear.

Tips and warnings

  • For pools without the circulating facility, dilute the required amount of flocking chemical into a bucket of water; stir thoroughly before walking around the pool and slowly pouring the mixture in.
  • Double or triple the recommended dose of chemical to speed up the settling process if desired.
  • Remember to reset the pump to the recirculating setting after each vacuuming session.

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