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Thread: How Often to Add Bleach

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    How Often to Add Bleach

    When the pool water is balanced and PH, ALK, CYA, etc. are all good, How often should I have to add bleach to the pool?
    I know there are varying circumstances, but in general how often. (every day, once a week, twice a week?) Please don't answer "whenever testing shows you need it", I believe I KNOW THAT. I'm looking for a general idea, so I can tell if I'm loosing CL to fast.

    Thanks
    Like a Mountain Stream - In matters of Style, you may change with the Flow. In matters of Principal, Stand like a ROCK.

    15,300 gal, 16' x 32' Vinyl In Ground Pool (No SWG)
    Sand Filter (don't know the flow rate)
    1-1/2HP Superflo Pump

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    frogabog's Avatar
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    Re: How Often to Add Bleach

    Sunny, hot day (swimmers or not) - daily, in the evening after all is quiet in the pool.

    Cloudy, cool, swimmers - possibly daily depending on test

    Cloudy, cool, no swimmers - every other day, test second day.

    That's my schedule.
    Where kids swim in 54 degree water, turn blue, and giggle happily cuz they got a POOL!
    Year 3 BBB -15' x 48" Intex Metal Frame - Was using (2) 1000gph Intex cartridge filters (see Full time pumping Intex). 2012, converted to 1600gph and sand filter+SWG = Sand filter love affair!
    Don't waste time and energy looking for a better value on test kits, the TF100 is the best deal around. I did the looking and spent the extra money, but you don't have to make the same mistake. Just go here: TFTestkits. I use Pool Calculator for min/max, and shocking chlorine levels.

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    Re: How Often to Add Bleach

    I add daily and use my test results to determine how much to add.
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
    Pool Calculator, Pool School, TF Test Kits

  4. Back To Top    #4

    Re: How Often to Add Bleach

    Will other members please post your daily and weekly schedules.

    I check the PH and CL almost daily and backwash and vacuum weekly or run Polaris automatic pool cleaner.
    I also check ALK and CH every week / 10 days or so.
    I thought the CL bleach would last longer than it does. I'm buying the large jugs from Wal-Mart (a little over 1 gallon) and add a little every night or two.
    Just wanted to know if this is about average.

    One problem I still have, is dirt/sand or some small fine particles showing up on the bottom of the pool after the pump runs for a day or two. I vacuum it out to waste or use a skimmer sock to catch it, but more shows up after a few days. Any suggestions?
    Like a Mountain Stream - In matters of Style, you may change with the Flow. In matters of Principal, Stand like a ROCK.

    15,300 gal, 16' x 32' Vinyl In Ground Pool (No SWG)
    Sand Filter (don't know the flow rate)
    1-1/2HP Superflo Pump

  5. Back To Top    #5

    Re: How Often to Add Bleach

    Quote Originally Posted by mynewpool
    I add daily and use my test results to determine how much to add.
    How did you figure out how much liquid bleach/chlorine to add to keep it at normal range?

    My test either show it as ideal (7.2-7.8) or almost none at all. I'm trying to figure out how much bleach to add at a time to reach the ideal range.
    I probably add a little to much when needed. I guess this is an ongoing learning process right now.
    Like a Mountain Stream - In matters of Style, you may change with the Flow. In matters of Principal, Stand like a ROCK.

    15,300 gal, 16' x 32' Vinyl In Ground Pool (No SWG)
    Sand Filter (don't know the flow rate)
    1-1/2HP Superflo Pump

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    Re: How Often to Add Bleach

    Your chlorine consumption depends heavily on the amount of CYA in your pool.....What is your test result for CYA?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  7. Back To Top    #7

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    Re: How Often to Add Bleach

    You should not have to backwash your filter weekly. Check the PSI when it's clean, then backwash when it climbs around 8 psi.

    If you are only adding a little bleach each night, I'd say you are doing well. I've had times where I needed a gallon or more a day, depending on sunlight, bather load, and CYA level.

    Dirt and sand and other fine particles can get into your pool from wind, and from pollen falling from trees. It isn't necessarily indicitive of a filter problem. If you believe your filter has a problem, you can hold a sock over a return and see if you get any sand in the sock. Filter sand is pretty course, you should be able to tell it from something being tracked or blown into the pool.

    Get your CYA level, then use http://thepoolcalculator.com to figure out how much chlorine to add.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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  8. Back To Top    #8

    Re: How Often to Add Bleach

    Quote Originally Posted by RobbieH
    You should not have to backwash your filter weekly. Check the PSI when it's clean, then backwash when it climbs around 8 psi.

    If you are only adding a little bleach each night, I'd say you are doing well. I've had times where I needed a gallon or more a day, depending on sunlight, bather load, and CYA level.

    Dirt and sand and other fine particles can get into your pool from wind, and from pollen falling from trees. It isn't necessarily indicitive of a filter problem. If you believe your filter has a problem, you can hold a sock over a return and see if you get any sand in the sock. Filter sand is pretty course, you should be able to tell it from something being tracked or blown into the pool.

    Get your CYA level, then use http://thepoolcalculator.com to figure out how much chlorine to add.
    I backwash after I vacuum the pool. What PSI is usually normal based on my pool info below? I believe it runs around 20psi.

    The fine particales only show up after the pump runs for 8 hours or so. I have vacuumed the pool, backwashed, and left the pump off for several hours with no visable signs of sand/dirt particles showing up. The dirt particles on the bottom are right below and in front of both return jets for my pool, not all over the whole bottom. Would adding some DE to the sand filter help? It does have dirt on the bottom and the steps after a heavy rain.

    If by chance the pump is blowing sand from my filter into the pool, what action do I need to take?
    Like a Mountain Stream - In matters of Style, you may change with the Flow. In matters of Principal, Stand like a ROCK.

    15,300 gal, 16' x 32' Vinyl In Ground Pool (No SWG)
    Sand Filter (don't know the flow rate)
    1-1/2HP Superflo Pump

  9. Back To Top    #9

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    Re: How Often to Add Bleach

    Normal is what your PSI runs after you backwash. So if you normally see 20, then it's 20. YOu don't need to backwash until you climb to 28.

    If you are leaking sand out into the pool, adding DE won't help. It could be a cracked lateral or bad o-ring somewhere. Do the sock test and make sure it's coming from the return. I have found when this is the case, it's worse when the pump first starts its daily cycle. It might be more telling if you can have someone assist you with the test after the pump has been off for some time.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
    If TFP has helped you, please click to SUPPORT TFP!

  10. Back To Top    #10
    aa62579's Avatar
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    Re: How Often to Add Bleach

    Quote Originally Posted by Redman
    Quote Originally Posted by mynewpool
    I add daily and use my test results to determine how much to add.
    How did you figure out how much liquid bleach/chlorine to add to keep it at normal range?

    My test either show it as ideal (7.2-7.8) or almost none at all. I'm trying to figure out how much bleach to add at a time to reach the ideal range.
    I probably add a little to much when needed. I guess this is an ongoing learning process right now.
    How did you determine 7.2 - 7.8 was your ideal chlorine level? Just asking because that sounds more like the ideal pH range. How much CYA do you have in the pool? That determines what level you need to keep chlorine at and a minimum level not to let it fall below.

    Find your CYA on this chart and it will tell you your minimum and target: http://www.troublefreepool.com/pool-...ya_chart_shock

    I tested nightly for a while and added enough bleach to get me back up to my target + 1 ppm. So if my CYA was 40, I brought it up to 6. (target of 5 + 1). I added the 1ppm so that in case I accidentally missed a night adding bleach, I would not drop down below the minimum value. (My pool uses about 1.5 ppm per day, so over two days, that would drop me from 6 to 3 which is the min.) On days that I know I will not be able to add the next night, I have doubled my addition. Normaly nightly addition is 2 cups for my small pool. If I won't be around the next night, I add 4 cups to bring me up to 7.5 ppm.

    If adding and testing nightly, add enough to reach target or 1-2 ppm over that.

    If adding and testing every other day, figure out how much your pool is using per day and add that to your target value. Then add enough bleach to reach that at least that value.

    Same process if you were checking every 3rd day, but that is really not practical with much sun or hot weather. Maybe in the spring or fall. If you cannot do daily or every other day, you might look into a liquidator or SWG.

    By the way, the pool calculator tells you exactly how many ounces to add. It does not need to be a guessing game.
    ~~ Allison ~~
    Intex 18' x 48" Easy Set Pool, approximately 5455 gallons
    Krystal Clear 1500 GPH Filter Pump Model 56635EG - 635 with Auto Timer
    BBB FOR BEGINNERS ~ THIS IS A MUST READ FOR ANYONE OVERWHELMED!!

  11. Back To Top    #11

    Re: How Often to Add Bleach

    Quote Originally Posted by RobbieH
    Normal is what your PSI runs after you backwash. So if you normally see 20, then it's 20. YOu don't need to backwash until you climb to 28.

    If you are leaking sand out into the pool, adding DE won't help. It could be a cracked lateral or bad o-ring somewhere. Do the sock test and make sure it's coming from the return. I have found when this is the case, it's worse when the pump first starts its daily cycle. It might be more telling if you can have someone assist you with the test after the pump has been off for some time.

    OK......it is normal at 20psi. I backwash and rinse after I vacuum the pool. I usually vacuum once a week, so I backwash and rinse to help clear and clean the sand. Is this not necessary?

    I replaced the sand in my filter before opening the pool this year. (Yes I used POOL SAND and not play sand) I inspected all of the laterials and they looked fine. I know that right after replacing the sand you get a certain amount of dust/dirt/debris from the new sand. But this has been happening the last few years. I'll do the sock test. It could be a bad o-ring I guess. It's just aggrevating that the pool is so clear and clean for a day or two, then this stuff appears on the bottom of the pool.
    Like a Mountain Stream - In matters of Style, you may change with the Flow. In matters of Principal, Stand like a ROCK.

    15,300 gal, 16' x 32' Vinyl In Ground Pool (No SWG)
    Sand Filter (don't know the flow rate)
    1-1/2HP Superflo Pump

  12. Back To Top    #12

    Re: How Often to Add Bleach

    Quote Originally Posted by aa62579
    Quote Originally Posted by Redman
    Quote Originally Posted by mynewpool
    I add daily and use my test results to determine how much to add.
    How did you figure out how much liquid bleach/chlorine to add to keep it at normal range?

    My test either show it as ideal (7.2-7.8) or almost none at all. I'm trying to figure out how much bleach to add at a time to reach the ideal range.
    I probably add a little to much when needed. I guess this is an ongoing learning process right now.
    How did you determine 7.2 - 7.8 was your ideal chlorine level? Just asking because that sounds more like the ideal pH range. How much CYA do you have in the pool? That determines what level you need to keep chlorine at and a minimum level not to let it fall below.

    Find your CYA on this chart and it will tell you your minimum and target: http://www.troublefreepool.com/pool-...ya_chart_shock

    I tested nightly for a while and added enough bleach to get me back up to my target + 1 ppm. So if my CYA was 40, I brought it up to 6. (target of 5 + 1). I added the 1ppm so that in case I accidentally missed a night adding bleach, I would not drop down below the minimum value. (My pool uses about 1.5 ppm per day, so over two days, that would drop me from 6 to 3 which is the min.) On days that I know I will not be able to add the next night, I have doubled my addition. Normaly nightly addition is 2 cups for my small pool. If I won't be around the next night, I add 4 cups to bring me up to 7.5 ppm.

    If adding and testing nightly, add enough to reach target or 1-2 ppm over that.

    If adding and testing every other day, figure out how much your pool is using per day and add that to your target value. Then add enough bleach to reach that at least that value.

    Same process if you were checking every 3rd day, but that is really not practical with much sun or hot weather. Maybe in the spring or fall. If you cannot do daily or every other day, you might look into a liquidator or SWG.

    By the way, the pool calculator tells you exactly how many ounces to add. It does not need to be a guessing game.
    You're right .... that's my PH level. I am going to do a testing tonight and post all of the results.
    Like a Mountain Stream - In matters of Style, you may change with the Flow. In matters of Principal, Stand like a ROCK.

    15,300 gal, 16' x 32' Vinyl In Ground Pool (No SWG)
    Sand Filter (don't know the flow rate)
    1-1/2HP Superflo Pump

  13. Back To Top    #13

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    Re: How Often to Add Bleach

    Did you fill your filter about halfway full of water before adding the sand? This cushions the sand from hitting the laterals hard when adding the sand. Also, you have to do a good, long backflush after adding new sand. At least 5 minutes.

    By the way, I replaced my sand filter (circa 1989) this year, it was blowing sand into the pool. We disassembled it and could not find anything wrong with it visually.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
    If TFP has helped you, please click to SUPPORT TFP!

  14. Back To Top    #14

    Re: How Often to Add Bleach

    Quote Originally Posted by RobbieH
    Did you fill your filter about halfway full of water before adding the sand? This cushions the sand from hitting the laterals hard when adding the sand. Also, you have to do a good, long backflush after adding new sand. At least 5 minutes.

    By the way, I replaced my sand filter (circa 1989) this year, it was blowing sand into the pool. We disassembled it and could not find anything wrong with it visually.

    Yes, I filled the tank over half full with water before adding the sand. I didn't backwash for 5 min., but maybe 2 min. I guess I could do a longer backwash.

    What did you wind up doing about the sand blowing into the pool?
    Like a Mountain Stream - In matters of Style, you may change with the Flow. In matters of Principal, Stand like a ROCK.

    15,300 gal, 16' x 32' Vinyl In Ground Pool (No SWG)
    Sand Filter (don't know the flow rate)
    1-1/2HP Superflo Pump

  15. Back To Top    #15

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    Re: How Often to Add Bleach

    The best way to determine your pool's chlorine consumption is to test frequently and keep records. Eventually, you will just know when to add and how much to get you in the ballpark.

    I add bleach daily and acid about once a week.

  16. Back To Top    #16

    Re: How Often to Add Bleach

    Just tested the water and the results are:

    CL = 2-3
    PH = 7.6-7.7
    TA = 90-100
    Hardness = 100-120
    CYA = 50-60

    I'm going to start keeping a log (great idea). I test in the evening when I get home from work, around 5-6:00PM.

    Thanks
    Like a Mountain Stream - In matters of Style, you may change with the Flow. In matters of Principal, Stand like a ROCK.

    15,300 gal, 16' x 32' Vinyl In Ground Pool (No SWG)
    Sand Filter (don't know the flow rate)
    1-1/2HP Superflo Pump

  17. Back To Top    #17
    aa62579's Avatar
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    Re: How Often to Add Bleach

    So that would mean you need to add around a gallon of 6% bleach. Did you get the same and add that amount?
    ~~ Allison ~~
    Intex 18' x 48" Easy Set Pool, approximately 5455 gallons
    Krystal Clear 1500 GPH Filter Pump Model 56635EG - 635 with Auto Timer
    BBB FOR BEGINNERS ~ THIS IS A MUST READ FOR ANYONE OVERWHELMED!!

  18. Back To Top    #18
    aa62579's Avatar
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    Re: How Often to Add Bleach

    Do you know FC and CC level? Are those numbers from test strips? A better test kit will make life easier now and will be almost a requirement if you get any algae.
    ~~ Allison ~~
    Intex 18' x 48" Easy Set Pool, approximately 5455 gallons
    Krystal Clear 1500 GPH Filter Pump Model 56635EG - 635 with Auto Timer
    BBB FOR BEGINNERS ~ THIS IS A MUST READ FOR ANYONE OVERWHELMED!!

  19. Back To Top    #19

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    Re: How Often to Add Bleach

    I agree you really need a better test kit such as the TF-100 or Taylor K-2006 it will allow you to keep a sparkling clear pool.

    I test my chlorine an ph daily and use the Pool calculator to calculate how much chlorine to add to get back up to the high end of my range and thanks to Jason's super cool Pool calculator for the I-phone i do it all at poolside..
    Steve Frakes
    15' X 48'' Intex Metal Frame
    Intex Sand Filter 16'' 2650 GPH
    Taylor K-2006 Test Kit
    BBB and Borated

  20. Back To Top    #20

    Re: How Often to Add Bleach

    Yeah......I need a Taylor Test Kit.

    Don't know the FC or CC levels.

    Test was done with LaMotte test strip and standard PH - CL tubes and solution drops. I was going by the Pool School "Recommended Levels" for a vinyl pool, no SWG.
    Everything else compares about right. I do need to order more CYA solution to keep up on the CYA level.


    Pool School Recommended Levels
    for a Vinyl Pool using Bleach

    FC 3-7
    pH 7.5-7.8
    TA 70-90+
    CH 50-300
    CYA 30-50
    Like a Mountain Stream - In matters of Style, you may change with the Flow. In matters of Principal, Stand like a ROCK.

    15,300 gal, 16' x 32' Vinyl In Ground Pool (No SWG)
    Sand Filter (don't know the flow rate)
    1-1/2HP Superflo Pump

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