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What chemicals do you need to close a pool?

4 min read

Asked by: Danielle Meyer

What chemicals do I need to close my pool?

  • Chlorine.
  • Pool Shock.
  • Soda Ash.
  • Baking Soda.
  • Muriatic Acid.
  • Winter Algaecide.
  • Pool Antifreeze.
  • Stain and Scale Prevention.

What chemicals do you need to shut your pool down?

Non-chlorine shock is most often recommended for pool closing because it won’t disrupt or destroy other winter pool chemicals that are usually added at the same time. Dichlor shock is often used for opening pools or during the summer, because it is stabilized against the sun.

Should I shock my pool before I close it?

Keep in mind that the chlorine shock will destroy the algaecide. The best course of action is to add the shock five to seven days before closing your pool, and then waiting to add the algaecide until right before you put the cover on.

How do I prepare for my pool closing?

Ten Steps to Closing your Pool the Right Way

  1. Balance water chemistry: The week you’re closing your pool, make sure your water falls within the ranges below. …
  2. Add shock and algaecide: …
  3. Clean pool: …
  4. Store equipment: …
  5. Lower water level: …
  6. Drain pump, filter, chlorination and heating equipment: …
  7. Lubricate: …
  8. Winterize plumbing:

Can you close a pool with high chlorine?

STEP 9: Do not close pools with high chlorine demand (tied-up chlorine). You must reach breakpoint chlorination before closing pool or a tremendous chlorine demand will be present next spring. Pools should have a free chlorine reading of at least 1.0 ppm before proceeding with steps 10 and 11 for most chlorine pools.

Do you need to put chemicals in the pool when closing?


And calcium levels are properly balanced because a properly balanced pool will protect you from corrosion. And scale buildup that can occur during the winter.

How much shock Do you need to close a pool?

Shocking your pool is easy: Use a shock treatment to bring your 10 to 12 PPM. Then, wait a day or two for the chlorine to come down to its normal level, about 1.5 to 3.5 PPM. Pro tip: For best results, shock your pool a few days before you plan to shut it down.

Should I put algaecide in my pool when closing?

By simply adding algaecide to your water prior to closing, you can prevent algae growth from occurring during the cold, winter months which makes for an easier opening in the spring. You can apply algaecide directly to the pool water and allow the pump to continue to circulate for approximately two to four hours.

Should I use shock or algaecide first?

While shocking and adding algaecide is effective in getting rid of algae, it should not be done together. This is because when you mix chlorine and algaecide together, it renders both of them useless. Hence, you should first shock the pool and wait for the chlorine levels to fall below 5 PPM.

How much chlorine do you need to close a pool?

Use 1 gallon of liquid chlorine per 10,000 gallons of pool water. Clean liner above the water line with Swimway Tile & Vinyl Cleaner or another product.

What chemicals do I need to close my pool for the winter?

What chemicals do I need to close my pool?

  • Chlorine.
  • Pool Shock.
  • Soda Ash.
  • Baking Soda.
  • Muriatic Acid.
  • Winter Algaecide.
  • Pool Antifreeze.
  • Stain and Scale Prevention.


What chemicals do you need to winterize an above ground pool?

Gather Your Pool Closing Essentials



Before you winterize your above ground pool, make sure you’ve got the necessary supplies: Winterizing chemical kit or pH increaser, Alkalinity increaser, Calcium hardness increaser, Pool shock, and Algaecide. Clarifying enzyme supplement (optional, but recommended)

Can you winterize a green pool?

In addition to winterizing the pipes, or filling them with pool antifreeze, take these steps as a minimum: Lower pH to 7.2, brush and skim to distribute. Shock the pool or add a winter chemical kit. Cover the pool tightly to block out leaves and sun.

Do I need to shock my pool in winter?

Shocking the pool during the winter months can certainly help to avoid a green swamp-like pool in the spring. It’s often recommended. However, poor water balance or improper application can lead to unintended consequences, such as discoloration and damage to pool surfaces.

Will baking soda clear a green pool?

Baking Soda and Green, Blue, or Yellow Algae



You’ll need to use an algaecide to kill the algae and superchlorinate your pool to clear the water. After this treatment, test your pH and alkalinity and add baking soda to raise alkalinity to at least 100 ppm and pH to between 7.2 and 7.8.