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How to Treat and Prevent Algae in Your Pool

Green pools are often caused by algae growth in the water. This could take on the form of patches of green, yellow or black substance that fluffs into the water when touched or stirred. The water may have discolouration, usually green.

**All dead organic matter must be MANUALLY VACUUMED on waste/drain prior to treatment! DO NOT use your automatic vacuum! **

Preparing the Pool:

  • 1) Remove solar blanket from pool and keep it off.
  • 2) Remove large organic debris from the bottom of the pool with deep leaf net.
  • 3) Turn dial on filter to waste/drain and then using a MANUAL VACUUM ONLY, remove small debris from the bottom of the pool.
  • 4) Top up pool with new water.
  • 5) Brush down the walls and the floor of the pool. Be sure to brush areas on and around steps, ladders and corners very well.
  • 6) If you have a timer on your pump turn it off and circulate your pool for 24 hours a day until it is clear.

Clearing the Pool:

  • 1) Bring a water test into your pool expert for analysis.
  • 2) Perform the recommended balancing treatment.
  • 3) Add 1 bag of HTH Super Shock per 50,000L. The water, most likely, will not change colour after your shock treatment. If there is a change in colour, you will probably notice the water has turned a darker shade of green. Wait 1 hour before moving to next step.
  • 4) Add 100ml of Pool Supplies Canada Algae 40 per 10,000L. Be sure you keep your pool circulating and your solar blanket and heater off. Do not move to the next step until the algae has been destroyed. The pool water will most likely have taken on a cloudy/white look once the algae has been killed.
  • 5) Once the algae has been killed and there is no green tinge left in the pool, add 1 full bottle of Natural Chemistry Pool First Aid.
  • 6) 48 hours after Pool First Aid has been added, be sure to chemically clean your filter.
  • 7) Test your water to confirm the amount of Natural Chemistry PhosFree or Natural Chemistry Extra Strength Phosfree you will need to add to your pool. Removing phosphates from your pool water will ensure that the algae bloom will not reoccur.

Please keep in mind, that depending on the amount of algae and debris in the pool water, you may need to repeat steps 3 and 4 if there is still algae present 48 hours after you did the initial treatment.

Always ensure pump and filter systems run continuously during all treatments! Every pool should be treated weekly with the Pool Supplies Canada Algae Free Guarantee Program to maintain sparkling, algae free water.

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