How much shock do I add to my pool?
William Rodriguez
Published Jan 24, 2026
To double shock, you will need to add 2 pounds for every 10,000 gallons of water. For instance, if you pool is 20,000 gallons, you will add 4 pounds of shock. Green or Dark Green Pool Water: This means there's a medium amount of algae in your water and you'll need to triple shock your pool.
Can you add too much shock to a pool?
Can you put too much shock in a pool? SKIMMER NOTES: It's unlikely but it could happen. It would take a lot of shock to really make the water unsafe for swimming. The best way to make sure you're safe to swim is to test your pool water and make sure free chlorine levels are between 1-4ppm for healthy swimming.
How much liquid shock Do I add to my pool?
12.5% Liquid Chlorine Pool Shock – Normal Dosage: 1 gallon of shock per 10,000 gallons of water. Shock Dosage: 2 gallons of shock per 10,000 gallons of water. Source: Champion Liquid Pool Shock instructions.
How do I add shock to my pool?
How do I shock my pool?
- Check that the pH levels in your pool are balanced.
- Prepare shock ahead of time in a 5-gallon bucket of pool water and stir.
- Ensure the pool pump is running. Pour the mixture from the bucket into the water around the edges of the pool.
- Let the pump run for about 6 hours or more and test the water.
Do you run the filter when you shock a pool?
Running your filter after shocking your pool is a must and is just as important to your pool as shocking it is. Be sure to run your filter for at least 6 hours, but shoot for 24 hours to several days, if your pool is particularly dirty or has algae, to properly circulate the chlorine and clean the water.
39 related questions foundHow much shock do I need for a 15000 gallon pool?
Typically for granular shock, you'll need one pound for every 10,000 to 13,500 gallons of pool water.
How much shock do I add to pool with algae?
To double shock, you will need to add 2 pounds for every 10,000 gallons of water. For instance, if you pool is 20,000 gallons, you will add 4 pounds of shock. Green or Dark Green Pool Water: This means there's a medium amount of algae in your water and you'll need to triple shock your pool.
Will Shock clear a green pool?
Shock Your Pool with Chlorine to Kill Algae
This is the main event in clearing a green pool—killing the algae. Pool shock contains a high level of chlorine that will kill the algae and sanitize the pool. For the best results, use a shock that contains at least 70% available chlorine (calcium hypochlorite).
Can too much shock make a pool cloudy?
1) After shock - Sometimes pool water looks cloudy right after you apply shock granules such as cal-hypo, or liquid shock, but rest assured it's only temporary. This could be due to change in water balance – meaning your pool water temporarily goes off balance when adding these products.
Why is pool still green after shocking it?
Algae will remain in your pool after shock if you've had insufficient chlorine and an overabundance of metal elements in the pool water. Therefore, to start the cleaning process. Remove all the debris from the pool with a leaf net and then let the smaller dirt fragments settle.
Why did my pool turn brown after I shocked it?
Brown pool water is often caused by metals (iron) becoming oxidized in the pool water. If you shocked your pool water and it turned brown you probably have metals. Oxidized iron usually turns a brown or rusty color in the water.
Why does pool turn green after shocking?
Pools can immediately turn green after shocking when they have metals like copper in the water. These metals oxidise when exposed to high levels of chlorine which makes the pool water turn green. Adding a metal control product such as Zodiac Metal Remover will help to restore the pool water.
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.
Is pool shock the same as chlorine?
Shock is chlorine, in a high dose, meant to shock your pool and raise the chlorine level quickly. Chlorine tabs (placed in a chlorinator, floater, or skimmer basket) maintain a chlorine residual in the water. You do need to use both tabs and shock.
Can you swim after shocking pool?
After Shocking Your Pool
It is safe to swim once your chlorine levels are around 5 ppm or after 24 hours. It is always best to test first!
How many pounds of shock do I need for a 30000 gallon pool?
How much shock do I need to shock my pool? A simple ratio and a standard rule of thumb to follow when you shock your pool is to dissolve one pound of either calcium hypochlorite or sodium dichlor for every 10,000 gallons of pool water.
How long does it take shock to work?
Give the shock a good 12 to 24 hours to work it's magic. If the algae hasn't cleared up after 24-48 hours, clean and brush the pool and add another shock treatment.
Should I backwash after shocking pool?
When the chlorine has completely finished working, the algae in the pool will turn a white/gray color and will either settle to the bottom of the pool or be suspended in the water. There shouldn't be any more green color and the water visibility should be improving. Run the filter 24/7 and backwash as needed.
Do you put algaecide in before shock?
Algaecide should be used after each shock treatment, so it has a better chance to support your chlorine as it works its magic. Be sure to shock your pool first, then when the chlorine levels of your pool return to normal, add the correct amount of algaecide to several places around your pool while your pump is running.
How long does shock take to clear a pool?
Heavy shocking with granular chlorine will generally require 24-48 hours before the chlorine level has dropped to safe swimming levels (below 5 ppm). Lithium and Non-Chlorine shock labels typically allow immediate swimming, but check the package label, to be sure.
How do I make my pool blue?
How do I turn my green pool blue?
- Shock the pool with chlorine every day until all the green is gone (possibly 3 to 4 days).
- 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).
What happens if you swim in a shocked pool?
If you enter the pool immediately following a chlorine pool shock treatment, you are risking as little as skin and eye irritation and as much as fatality.
How many bags of shock do I need for a 10000 gallon pool?
One bag of In The Swim cal hypo is always 1 pound, therefore, you need three bags to triple shock a 10,000-gallon swimming pool and get rid of algae. *For liquid chlorine or sodium hypochlorite with 12.5% chlorine, add 10 ounces for a 10,000-gallon pool to raise free chlorine (FC) by 1 ppm.
How do I get the film off the top of my pool?
Skim the top of the pool for debris that may have settled on the pool surface. Add one pound of diluted granular shock to the water for every 7,000 gallons of pool water. Run the filter for 24 hours and retest the water. The slimy looking film can be an early onset of algae.
How do you keep a pool clean without chemicals?
How To Keep Your Pool Clean Without Chemicals And Filters? (9 Tips)
- Use Salt Instead Of Chlorine. ...
- Baking Soda. ...
- Use a Melamine Sponge. ...
- Lemon Juice. ...
- Use Sphagnum Moss. ...
- Use Oxygen Cleaning Technology. ...
- Use Ionization Tablets. ...
- Use a Robotic Pool Cleaner.