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What chemicals do you need to winterize your pool?

7 min read

Asked by: Carlos Plummer

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 put in above ground pool for winter?

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)

How many bags of shock Do you need to winterize a pool?

Several days before closing, shock the pool with a chlorine shock or non-chlorine shock, using at least 2 lbs per 10,000 gallons (follow package directions).

How do you add winterizing pool chemicals?


Once it's balanced the first chemical you want to add is the rust and scale preventer. And you'll add that to the pool. And then wait about thirty minutes let it circulate.

Do I need to put chlorine in my pool in the winter?

During the winter months, the amount of chlorine needed from your salt cell to keep the pool clean is reduced. This is due to the fact that it is difficult for bacteria to grow in cold temperatures.

How do I prepare my pool for winter?

Follow the steps below to prep your pool for the winter months.

  1. Step 1: Remove pool accessories. …
  2. Step 2: Deep clean the pool. …
  3. Step 3: Adjust the water chemistry. …
  4. Step 4: Lower the water level. …
  5. Step 5: Drain and store the equipment. …
  6. Step 6: Add shock and algaecide. …
  7. Step 7: Cover the pool.


Do you put antifreeze in above-ground pool?

Pool antifreeze is not for the pool, but for the pipes. For aboveground pools, you should use an air pillow to break up the ice sheet that forms in the pool, or you can use half a dozen milk jugs, filled partially with pebbles and pool antifreeze, to absorb the ice expansion.

Should I shock pool before winterizing?

Shocking kills any bacteria that might linger in your pool during the winter. We recommend shocking a few days before you close the pool. If that is not possible, make sure to shock the pool the night before you close it for winter.

Should I add algaecide when closing pool?

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.

How much liquid chlorine do I need to winterize my pool?

Super chlorinate with liquid chlorine or other chlorine source and add winterizing chemical kit to pool; allow filter to circulate to evenly distribute chemicals. (Use chemicals as labels indicate.) Use 1 gallon of liquid chlorine per 10,000 gallons of pool water.

What do you put in a pool at the end of the season?

Prevent Algae and Run Pump



Wind blows the spores into the water of outdoor pools. However, proper prevention can keep the spores from blooming into a colony. Add a dose of an algaecide according to label directions for pool closing to protect your pool from algae growth during the off-season.

How long should I run the pool pump in winter?

Depending on the size of your pool, we still recommend you run your pump run at least 4-6 hours a day during the fall and winter months. The daily cycle can be divided into multiple cycles, but each cycle should be no shorter than 4 hours, for all the water to pass through the filter at least once.

Does pool shock work in cold water?

The cold water, anything below 65°, has an impact on the ability of the chemicals to dissolve properly. I would recommend using liquid chlorine if you have to shock in lower temperatures. You can dissolve granular shock in warm water. Perhaps it will work if you completely dissolve it before adding it to the pool.

How do I shock my pool for winter?

Start by pulling the cover back so that at least half of the pool is exposed. Pre-dissolve your pool shock (always follow label instructions), add it to the water, then vigorously brush the pool to agitate the water. Alternatively, you can also use a submersible pump and a length of hose to get the water moving.

How do I keep algae out of my pool in the winter?

7 Ways to Prevent Algae in Your Pool this Winter

  1. Cover Your Pool. …
  2. Keep the Pool Cover Clean. …
  3. Maintain the Chemical Balance of Your Pool. …
  4. Regularly Shock Your Pool. …
  5. Run the Filter Regularly. …
  6. Check You Pool on a Regular Basis. …
  7. An Ounce of Prevention.


What is the difference between shock and chlorine?

Chlorine is a sanitizer, and (unless you use Baquacil products) is necessary for maintaining a clear and healthy pool. Shock is chlorine, in a high dose, meant to shock your pool and raise the chlorine level quickly.

Does Clorox pool shock have chlorine?

OXI Chlorine-Free!



Chlorine-free formula clears cloudy water.

Can I use chlorine tablets to shock my pool?

However, it’s important to note that you can’t shock your pool with regular chlorine tablets. While pool shock is usually made from chlorine, pool shock chemicals are much more highly concentrated. Proper shock treatments are designed to literally “shock” your pool and raise the chlorine level quickly.

Can I use bleach in my pool?

Clorox itself recommends using between ounces of regular-strength bleach per 10,000 gallons of pool water — one gallon is 128 ounces, and many bottles of bleach are available in one-gallon or half-gallon sizes. Pool professionals tend to recommend more conservative amounts of bleach.

Will baking soda make pool water clear?

The simple answer is No. Baking soda cannot be used to clear up a cloudy pool because it is a base. Bases raise PH levels, which causes the water to turn cloudy. Some people suggest using baking soda as a quick fix to high alkalinity levels, but it’s not reliable as a pool chemical.

What does baking soda do to pool water?

Baking soda, also known as sodium bicarbonate is naturally alkaline, with a pH of 8. When you add baking soda to your pool water, you will raise both the pH and the alkalinity, improving stability and clarity. Many commercial pool products for raising alkalinity utilize baking soda as their main active ingredient.

How do I make my pool water crystal clear?

In theory, if you have a cloudy swimming pool, you can add chlorine to “shock it” and clear things up. Chlorine will get the job done. But, the amounts may vary and you may have to really pound the pool with chlorine to get the water totally clear.

How can I make my pool water blue?

How do I turn my green pool blue?

  1. Shock the pool with chlorine every day until all the green is gone (possibly 3 to 4 days).
  2. Run the filter 24 hours a day and backwash every day until the green and then cloudiness is gone (usually up to 7 days, sometimes as long as 2 weeks depending on the filter).

How do I make my pool water sparkle?

Five easy steps to a sparkling clean pool

  1. Circulate the water. Pool chemicals need to be evenly distributed if they are going to work most effectively. …
  2. Clean the filter. The filter is one of your pool’s most important components. …
  3. Brush and vacuum. …
  4. Test the water. …
  5. Use the right products.


What chemical clears cloudy pools?

Answer: Try using chlorine bleach (liquid chlorine) instead of granulated chlorine; this will clear and help keep away algae from your pool. Free chlorine should always be at 3ppm to avoid algae and cloudy water.

Will Shock clear a cloudy pool?

Poor water chemistry causes most cases of cloudy pool water. Test your water to make sure it’s properly balanced. Chlorine issues often cause hazy-looking water. Adding a recommended dose of pool shock to your pool can clear it right up.

How do you remove sediment from bottom of pool?

Off it blows back in this stuff but I'm going to show you this device that works real well I didn't know how well it work when I got it but I have had to modify it it's called a pool vac here.