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Q&A for How to Shock Your Swimming Pool
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QuestionCan I shock during the day if I close the pool cover?Community AnswerAlthough you can, some chlorine will be destroyed by the sun's UV rays. You won't have the full effectiveness of the shock treatment. It would best if you do it under the shade followed by covering it. Covering the pool does help protect the chlorine for 2 days. It is best to do it at twilight hours in the evening.
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QuestionIf I open a portal into the return line from the pump, won't the pressure from the pumping water force water to spray out of the line? How would I add shock "into the return line" this way?Community AnswerDon't open anything - you pour the shock directly in the pool in front of the return so the stream carries it through the pool.
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QuestionDose the pump need to be on when shocking?Community AnswerYes, it does keeping the water moving will help spread the chlorine and kill the algae -- hence the term shock.
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QuestionIs there a normal technique for shocking a pool?Community AnswerDistribute the shock around the pool evenly in a bucket diluted with water. Or you can pour it directly in front of the return fitting.
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QuestionWhy can't I save my unused shock powder for next time if my pool is smaller than the bag?Community AnswerIf the powder didn't get wet, it should be good to use. Store it in a cool, dry places, away from sunlight. It may be slightly less effective after being open, but it should last until the next treatment (especially if you're shocking the pool weekly or monthly).
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QuestionWhy is my water brown after using shock treatment?Community AnswerYou likely have metal in the pool water (e.g. iron, manganese). Your pool store will have products to remove metal from the water and brown stain from the liner if it got stained.
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QuestionHow much does it cost for the supplies to shock a pool?Community AnswerIf you maintain the pool yourself, about $30 a month average for chemicals.
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QuestionHow long after shocking a pool do I need to wait to get into it?Community AnswerUntil the chlorine level is 3ppm or less. You'll have to check chlorine level frequently until it's safe.
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QuestionHow long do I have to wait after the shock treatment to use the pool?Community AnswerThat depends whether you use a chlorine or non-chlorine shock. With a chlorine shock, you can swim in it about 4 hours later. For a non-chlorine shock, you just need to wait 15 minutes.
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QuestionDoes shocking the pool make the pool water cloudy?Madi2006Community AnswerIt does at first, but it should go away after a while.
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QuestionAfter I put the chemical in the pool, do I leave the pump in "circulation" or "filter" mode, or should I stop the pump until the dead bacteria go to the bottom of the pool?Community AnswerYou leave the pump running in filter mode so that the chlorine can be distributed all around the pool and do its job. It's best to leave the pump running for 24 hours after shocking the pool.
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QuestionIf I am out of shock, can I use double chlorine to shock it?Community AnswerShocking uses three to five times the normal amount, so double would not be sufficient.
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QuestionShould the filter remain running after adding the chemicals?Nick WyshinskiCommunity AnswerThe pump and filter should be running while adding chemicals in order to disperse them properly.
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QuestionShould I have the filter in the pump when I shock the pool?Community AnswerYes. The filter clears the contaminates from the water and keeps your water clear and blue.
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QuestionI shocked my pool with a chlorine-based shock and the pool became cloudy. What should I do?Community AnswerI would use a test strip to check your levels. It sounds to me like you need a stabilizer.
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QuestionHow long before I can swim after a shock treatment?Community AnswerThat depends whether you use a chlorine or non-chlorine shock. With a chlorine shock, you can swim about 4 hours later. For a non-chlorine shock, you just need to wait 15 minutes.
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QuestionIf an animal pooped or peed in the pool, what should I do?Alex SaminCommunity AnswerDrain the water, then shock the new water.
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QuestionHow long does it normally take for the chlorine level to go down?Community AnswerThat depends whether you use a chlorine or non-chlorine shock. With a chlorine shock, you can swim in it about 4 hours later. For a non-chlorine shock, you just need to wait 15 minutes. Be sure to check your CL2 ppm levels. If it's 3ppm or less, you're good to go. If you shock a pool in the evening, you should be fine the next morning.
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QuestionAfter using shock and pool clarifier, the water in my pool is still cloudy. What else can I try to clear it up?Community AnswerI would recommend having your water tested at a pool supply store. They often have free testing and will provide you a 'cocktail' of chemicals to clear up the water.
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QuestionWhat routine is used when thinking about shocking my pool in winter?Lee TonCommunity AnswerIf there’s no algae in the pool, there’s no need to shock. In the winter when water temp is below 60°, it’s very difficult for algae to grow. Unless you live in a warm climate, odds say there’s little need to “shock.”
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QuestionCan I add all the shock at once to my swimming pool or does it need to be 1 lb at a time?Lee TonCommunity AnswerKeep in mind the purpose of adding the large dose of chlorine, to kill algae faster than it can reproduce. If you add it all at once, then there’s a huge chance the algae and sun will consume the chlorine well before all the algae is killed, thus leaving you with a cloudy/green pool. It took a while for the pool to go green, it’ll take a while to clear it up too.
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