I say stinking because usually if you encounter a pool with a strong chlorine smell, it is in fact combined chlorine you are smelling. Shocking then releases the combined chlorine and off-gasses the contaminants, increasing the amount of free chlorine in your pool or spa. The question of whether to use a chlorinated or non-chlorinated shock will depend on how much total chlorine you have in your pool or spa.
If your total chlorine level is high, you will use a non-chlorine shock; if it is low, you will use a chlorinated shock. The formula for hitting breakpoint can get a little complicated, so we suggest you talk to your pool professional. The second most common reason for shocking your pool or spa is to raise the sanitizer level quickly. Sometimes, after a party, for example, your chlorine level will just bottom out.
When this happens, you want to quickly get your chlorine level back up to the recommended ppm parts per million before algae or bacteria can gain a foothold. If this is the case, you will want to use a chlorine shock. How often you need to shock your pool is dependent on many factors such as bather load and frequency, weather factors such as extended periods of rain or sun, and environmental factors like pollen, leaves or dust. All that said, a general rule of thumb for most pool owners is you should shock once a week, knowing, however, that unusual events might require more frequent shockings.
The ideal time to shock your pool is in the evening after all swimming is complete. In the evening because the sun will not be boiling the chlorine out of your pool, and after everyone is done swimming because shocking is going to bring the chlorine level up to a level that may be irritating to skin and eyes.
Shocking a pool — what is it, why and when to do it. I dissolve the shock into a bucket with water…How much water do I use with the shock mix??? Use a 5-gal bucket, and fill it with pool water, add the shock and stir for about a minute.
Then pour into the pool, being careful with the remaining particles, which may need another soaking to dissolve fully. How much shock should I use? Hi Patsy, first make sure the pH is not high, over 7. After mins, if it has not turned a blue-ish grey color, add more shock, until it does… Run the filter all night. With a vinyl pool, be sure to pre-dissolve the shock in a bucket of pool water, before adding.
I have a gallon intex 12x 30 above ground pool. How much shock should I put in the pool and how often? So you would multiply the dosage amount by 0. I also like to use poolcalculator.
Hi Walter. Salt systems require an initial large dose of salt, and then annual booster amounts to make up for backwash water, splash out and refill water used, which dilutes an lowers the salt level in the pool. Most shocks are 1 lb per 10, gallons, so for your 45K pool, use 5 lbs when the water looks clean and clear.
IF you are killing algae, double the dose, or for severe algae triple the dose or more if you a swamp on your hands. If the pool looks great, just shock once per month, with 5 lbs, to kill any stray bacteria and remove chloramines, aka combined chlorine.
Initially Add lbs of Salt, per 10, gallons, to reach ppm from 0 , or for your pool, lbs of Pool Salt. Or another way to look at it is — add 8 lbs of pool salt, per gals, to raise salinity level ppm. Every month or so, you should check your salt level and add a booster shot if you are getting close to the minimum level recommended by the manufacturer. I have similar size pool about gallons 12 x How much 1in tablets should be in the floater?
Hi Michael, probably just 1 3-inch tablet, or half a dozen 1-inch tablets. Your test kit will tell you for sure. If the chlorine level is ppm, use less. If the chlorine level is , use more.
Use enough to establish a constant and consistent level of ppm, which can vary… depending on weather, temperature, bather load and debris load, and filtration effectiveness, and the use of any other supplemental chemical…. Hi I have gallon above ground pool. Should I use shock in it for a weekly cleaning, and if so how much. For such a small pool, the need for shocking is greater than for larger pools.
I would shock smaller pools, with smaller, less effective filters and less of other things as well… so yes every week to ten days, I would shock that pool.
You can use non-chlorine shock, if you are not trying to kill algae, or any extreme contamination or water problems… The normal shock dosage for a clean and clear pool is 1 lb of granular per 10, gallons of pool water. Dissolve it into a bucket of clean water, and pour around the edge of the pool, with the filter running. Before shocking, check pH level, and add pH decreaser if 7.
NOTE: Store open bag of shock with great care, to prevent contamination from moisture, bugs, dirt, or any-thing. Use paper clips to close tightly, and store inside of a tupperware type bowl, by itself. My bag of instructions say to throw granules directly into pool. Also, how much granules for algea and how much granules for metal and stain, and how often? Thank you!! Fran, some more expensive shock types which are very fine, or non-chlorine shock can be added without pre-dissolving, but Cal Hypo pool shock should be, as the granules, if sitting on the pool floor, could damage the vinyl, or bleach the color.
Hi, if the water is mostly clean and clear, just 2 oz of the chlorine powder would be sufficient. Pre-dissolve the chlorine in a bucket of water, and then pour into the pool. Be careful with the opened bag of shock.
Clip it tightly closed, and store it in a plastic tupperware container, to prevent spills and contamination from dirt, insects and moisture. Hi i have the same pool but have never used chemicals, had it for two weeks and it is green.
I see you said to use 2 oz of shock, but should I use other chemicals with it. The test strip currently reads 8. Hi Rebecca, if your inflatable pool is green, I would suggest draining the pool, scrubbing the walls no soap and refilling with fresh water. Then keep a constant and consistent level of chlorine in the water, with a good pH level of 7.
High pH and low chlorine is a recipe for bacteria that can make swimmers sick. Use pH decreaser to keep the pH from rising above 7. How much shock and other things I need, to get it ready. You may also want a bottle of Clarifier, and a bottle of Algaecide, both added every week or two.
How many bags of 1 pound shock do I use to first open it? Hi Priscilla, a pool your size has about gallons. Most shock dose is 1 lb per 10, gallons, so use 1 lb when the water is clear or a bit cloudy.
If you have algae, use 2 lbs or 2 bags. If the algae is severe, add 3 or possibly 4 bags. Depending on how green it is, use, 2, 3 or even 4 lbs of shock per 10, gallons for light, medium or heavy algae. Hi, I have taken a sample of my pool water to a pool supply company twice now it a two week period.
They keep telling me that all my levels are reading normal, but my pool water is cloudy. This is an 18 foot, above ground pool. The sand filter is working fine, and I have shocked it a few times now. Hi Sara, if you chlorine level is fine, and your ph and alkalinity and other measures are also within range — it must be the filter.
Either not operating long enough each day, or the sand needs to be changed, or the filter valve or filter is operating improperly and bypassing some water, around the filter and back to the pool. You can also use a filter cleaner, to try to remove oil and scale, which reduces sand filter effectiveness. I just put shock in my pool, I just sprinkled the loose crystals around my pool slowly , Was I supposed to pre-dissolve them first.
Anna, only if you have a vinyl liner pool. When chlorine crystals lay on vinyl, it could bleach them or remove some of the colorant, and could also corrode the vinyl a small bit, before the granule dissolves fully. Not usually once or twice, but doing it over time can fade or damage vinyl.
Vinyl pool owners should pour the crystals into a clean 5-gal bucket already filled with water, and then stir for seconds to dissolve. Pour around the pool, and be careful as the bucket empties, not to pour in undissolved granules, but refill again, and stir again, then pour into the deep end, hitting with a brush if necessary to help disperse and dissolve.
Skip to primary content. Skip to secondary content. Additionally, UV rays from bright sunlight will decrease the amount of free chlorine in your pool. Make it a routine to shock your pool more often in the summer, when the weather is hot.
Use cyanuric acid to stabilize the free chlorine and prevent UV rays from consuming the chlorine at a higher rate. Chlorine levels reduce more quickly when many swimmers use a pool on a consistent basis.
You should measure levels of free chlorine and chloramine after heavy swimming, especially in commercial or public pools, and shock the pool as required. To find out what amount of free chlorine or any other chemical to add to a pool, I use this pool calculator by Trouble Free Pool to help me find the correct amount of chlorine to add.
All you have to do is enter your chemical and pH readings. Controlling the chlorine levels in saltwater pools is easier. All you need to do is raise the saltwater chlorine generator SWCG to boost free chlorine prior to and after heavy usage. Before I changed my non-saltwater chlorine-based pool to saltwater two years ago, I used to shock regularly. Basically, a chlorine-based pool needs more maintenance than a saltwater pool.
Unless there is an algae outbreak or a build-up of contaminants such as oil and soil, a saltwater pool does not need much treatment. This is because saltwater pools use chlorine generators to produce a chlorine compound similar to the chlorine in shock treatments.
Chlorine generators can be adjusted to increase the amount of chlorine in the pool, for instance, before heavy usage. However, this technically isn't shocking. It is just a way to maintain chlorine at the recommended level. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.
Answer: One gallon of liquid chlorine should be added to a 10,gallon pool. Two questions: how much chlorine do I need to shock it, and can I use regular Clorox? Answer: The best thing to do is to take the reading for free chlorine first; then you can use pool calculator to find the amount of chlorine to add.
Your free chlorine should always read 3 ppm. A gallon pool may just need 0. Instead of using Clorox, I recommend regular liquid chlorine bleach or Sodium Hypochlorite for daily shocking, Clorox has lots of Calcium Hypochlorite and is good only for killing algae.
Answer: You will need around 10 lbs of shock for your gallons pool. You can try using a tool known as "The Pool Calculator" that you will find online to help you identify your pools chemical needs. Answer: Yes, you have to reshock it since free chlorine will be diluted. Just take a reading for free chlorine and adjust it to 3 ppm if it reads less than that. Question: I have high iron content in my pool water and I shocked it, now it's green. Answer: Green color means you have algae in your pool.
Make sure your pH is stable then add liquid chlorine shock in the pool to kill algae. Answer: Free chlorine will not balance when stabiliser is high.. Is that enough or even good idea or do I still need to shock it once in a while? Answer: I always recommend using liquid chlorine sodium hypochlorite to shock your pool every evening because it does not raise Cyanuric acid like tablet chlorine.
However, if you know what you are doing to balance chlorine and Cyanuric acid it's just fine to use chlorinated tablets. You may need liquid chlorine when your pool has algae or cloudy water. Question: Your article says to shock the pool if the free chlorine drops below 3 ppm. If the target is 3 ppm, the cL level will often be below 3 ppm. What am I not understanding? FC is the one responsible for disinfecting the pool.
CC, also known as chloramine, is a used up chlorine and is the one that causes cloudiness; this should always be 0 ppm for a very clear pool.
This means that your Free Chlorine should always be 3 ppm. In some cases, FC may drop, but it should not go down passed 2. When CC goes higher than 0. Question: I shocked my pool today, and it said we could swim after 15 minutes, and we did, now I checked chorine, and it's not registering at all. Should I shock it again tonight? Answer: Before adding more chlorine, check and confirm that all chemicals in the pool especial pH, TA, Calcium Hardness, and any stabilizer are all balanced; without doing that free chlorine will not balance.
Answer: Ammonia comes in pool or spa when proper free chlorine FC level is not maintained. To clear ammonia in your pool, you will need lots of liquid chlorine preferred , enough to raise and maintain FC level between 8ppm and 12ppm until you get rid of ammonia in your pool or spa. To raise FC, add enough liquid chlorine to bring your FC level to 12ppm, test FC level after every hours and raise it back to 12ppm when it drops. Don't let your FC level go below 8ppm by adding more to raise it back to 12ppm at least twice a day until you get rid of the ammonia, which might take a couple of days or even more to clear.
Question: What type of shock shoud I use for black algae on my 15, gallon pool with elevated calcium hardness?
Answer: Use liquid chlorine also know as sodium hypochlorite. Avoid Calcium hypochlorite because it will further raise your CH. Answer: The standard measure is 2 litters or 1lb 1bag of chlorine shock per 10, litter pool. So the correct amount for a 70K liter pool is 14 litters or 7 bags of chlorine. Answer: Yes, but you need to make sure pH and Free Chlorine are stable before adding Calcium hardness. Answer: Super blue is a Pool Clarifier that removes dirts and debris from your pool to filter.
You can backwash your filter to clean it after using super blue. Question: Using Non-chlorine shock in a gallon spa Answer: Most non-chlorine pool shocks out there are for weekly maintenance and should be added once a week.
Answer: Yes, you need to shock your bromine pool to remove chloramine and reactivate bromide that oxidizes contaminants and removes bromamines from your pool. Question: My pool volume is cubic litres, I use chlorine 90 how much of this should I use to shock treat my pool it is very cloudy and not visible at the bottom?
Question: I have a gal saltwater pool. Lots of lite blue staining. I followed your ascorbic process to remove stains. The stains are still there. On the steps where the Ascorbic acid was more direct color is pale green.
What should I do next? Answer: Ascorbic acid should remove metal stains if the right amount is added. Make sure free chlorine level is 0ppm because chlorine reacts with metal forming stains. Raise free chlorine to normal level only after clearing all the stains. If it goes green after shocking it, it's possible you have Copper metal in your pool or fillwater causing green stain when chlorine is added.
Copper stains are common if you use well water or copper based Algaecide in your pool. Before you add chlorine, add Metal Magic by ProTeam to remove copper metals through your pool filter. I added 1 gallon of super chlorine last night but pool is still very green after shocking 12 hours ago and running filter all night.
Since shocking, my free chlorine is now testing between , ph level high so not sure if I should add another gallon of chlorine?
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