Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 22

Thread: liquid bleach

  1. Back To Top    #1

    Join Date
    May 2011
    Location
    Jackson, MS
    Posts
    27

    liquid bleach

    Can someone explain, or point me to the place on here, to understand liquid bleach vs shock???

    I've been having trouble with a cloudy pool and after a few days of rain and the filter was off a day (or two) we now have a greenish tinge to the pool. Water is getting tested today, but I've been reading about people adding liquid bleach to their pool and having success in a day! I would love that!!! Everything I have read so far has not made sense. Please help.
    Thank you
    Northern who moved to the south and now has a pool!

    25,000 gallon pool - plaster
    Purex Triton sand filter

  2. Back To Top    #2

    Join Date
    Aug 2010
    Location
    Boston, MA
    Posts
    176

    Re: liquid bleach

    What pools stores sell as "shock" is just other forms of chlorine (cal-hypo or dichlor, usually). Properly understood, "shock" is a process not a product.

    It sounds like you have an algae bloom starting, so you need to go through a shock process. To do this, you will raise the chlorine to a level determined by your CYA level, and KEEP IT THERE with frequently (i.e. hourly) testing + addition of more chlorine until the water is clear and you lose less than 1 PPM FC overnight. What particular product you use to add the chlorine is less important, though bleach (or the more concentrated form the pool store sells) is the only one that's not going to add stuff to your pool which will (a) be hard to get out and (b) cause problems when (not if!) the level gets too high. This will not be practical with pool store testing, as you probably realized. You will need to get your own test kit (I'd recommend a TF100XL linked from Pool School).

    Start by reading Pool School (link up at the top right of the forum), especially regarding test kits, forms of chlorine, and shocking.
    20k gallon IGP
    Plaster over gunite
    3/4 hp Hayward pump
    Purex Triton DE filter
    TF100 test kit w/ speedstir

  3. Back To Top    #3

    Join Date
    Jul 2007
    Location
    Northern NJ
    Posts
    299

    Re: liquid bleach

    Hi and Welcome!

    Bleach is just that, bleach. It is the regular, unscented bleach that you use for everyday household chores. The sodium hypochlorite concentration in regular bleach is usually 6%.

    Liquid chlorine or Liquid shock (as most pool stores/manufacturers like to call it) is a stronger concentration. It can be found in 10% or 12.5% strength.

    You can use either bleach or liquid chlorine for shocking or everyday chlorination of your pool. The amount you would need is based on a number of factors and can be determined using the pool calculator,http://www.thepoolcalculator.com/.

    It sounds like you have an algae bloom forming and you will need to shock your pool. Get a full set of test results and post them here. Also, start reading Pool School so you can start to understand how your pool works and how best to maintain it.

    Here is a link to the article on how to shock your pool.
    Nicole

    21' AGP (10,400g)
    Hayward PowerFlo Matrix dual-speed 1HP pump, 75 sq ft Waterway cartridge filter
    4G Liquidator, Aquabot POOL ROVER S2-40

  4. Back To Top    #4
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,333

    Re: liquid bleach

    As said, bleach is just another form of chlorine. What makes it so attractive is that it's usually cheaper than other forms and it doesn't add extra things like CYA or Calcium to the water.

    In order to effectively shock your pool, because as also having been said, Shock is a process and not a one time thing you do, or a product you throw into your pool, you're going to need a good test kit. If you have a good test kit then a set of test results is needed. You have to know your CYA level in order to know what your shock level is.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  5. Back To Top    #5

    Join Date
    May 2011
    Location
    Jackson, MS
    Posts
    27

    Re: liquid bleach

    Test results are in!! The question I have is should I vacuum to waste to remove some of the water from the pool and then add more water and test it before fixing the high ph - or will that help the high ph? but the pool is definitely green.

    TC 2.5
    FC2.5
    ph 7.9
    TA 110
    CH 250
    Stabilizer (CYA) 185!

    please help!!
    Northern who moved to the south and now has a pool!

    25,000 gallon pool - plaster
    Purex Triton sand filter

  6. Back To Top    #6

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: liquid bleach

    Well, we know why the pool is green now! I'm surprised your TC wasn't higher than your FC, but there you go...

    Did you measure the CYA, or did the pool store? I am sure your CYA is high, but typically the pool store is all over the place when it comes to CYA accuracy.

    If you are sure you are at 185, you are certainly going to have to drain some water, or you'll be buying a chlorine factory to shock.
    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!

  7. Back To Top    #7

    Join Date
    Aug 2010
    Location
    Boston, MA
    Posts
    176

    Re: liquid bleach

    185? Ouch. I had a nightmare dealing with algae when I finally learned about BBB last year, and mine was only 100. You'll want to replace 2/3 of the water or so, maybe even more.
    20k gallon IGP
    Plaster over gunite
    3/4 hp Hayward pump
    Purex Triton DE filter
    TF100 test kit w/ speedstir

  8. Back To Top    #8

    Join Date
    Jan 2009
    Location
    Southern Nevada
    Posts
    37

    Re: liquid bleach

    Be careful draining your pool if you live in a high water table area or if you have a vinyl liner or if you live somewhere like I do where the sun will blister the plaster when it is exposed without water.

    You may need to drain a little at a time uses more water but it could save money in the long run.
    18,500 gallon, 16' x 38' freeform ig plaster w/ 7 ft spill over spa
    Pentair C&C+ 420 cart, Inteliflo 4 x 160 pump - new plaster on 5/5/09

  9. Back To Top    #9

    Join Date
    May 2011
    Location
    Jackson, MS
    Posts
    27

    Re: liquid bleach

    After doing a lot of reading I want to make sure I understand.
    To lower my CYA I HAVE to drain most of the pool water.....the other option would be to maintain a FC level of 10 or so!

    If I get the FC up and add some muriatic acid will the CYA lower on its own?
    Northern who moved to the south and now has a pool!

    25,000 gallon pool - plaster
    Purex Triton sand filter

  10. Back To Top    #10

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: liquid bleach

    The CYA will not lower on its own. You are going to have to drain. 185 is way above where you want to be, no matter the situation. It's going to take HUGE amounts of chlorine to shock with CYA at that level.
    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!

  11. Back To Top    #11

    Join Date
    May 2011
    Location
    Jackson, MS
    Posts
    27

    Re: liquid bleach

    Draining it is.

    Now, since I have an algae bloom should I be draining AND adding bleach? I just want to get the biggest bang for my buck.
    Northern who moved to the south and now has a pool!

    25,000 gallon pool - plaster
    Purex Triton sand filter

  12. Back To Top    #12
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: liquid bleach

    Get CYA down to something more reasonable, certainly under 100, preferably down around 50 or 60, and then start adding chlorine.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  13. Back To Top    #13

    Join Date
    May 2011
    Location
    Jackson, MS
    Posts
    27

    Re: liquid bleach

    Started draining last night, (vacuum to waste) and added more water this morning. Going to vacuum to waste again tonight and add more water and then run the numbers again.

    Correct me if I'm wrong, but this is the best plan of attack right? Get the CYA down before adding more things to the pool. Of course the lady at the pool store said all we need is to lower the pH. (Of course my husband didn't tell her the pool is green and we need to shock it.)

    I'm stopping by Sams after work to stock up on bleach to shock the pool when we get the CYA down.
    I cannot wait until my test kit comes in the mail!!
    Northern who moved to the south and now has a pool!

    25,000 gallon pool - plaster
    Purex Triton sand filter

  14. Back To Top    #14
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,333

    Re: liquid bleach

    You are on the best plan of attack. There's no use wasting chlorine just to pump it out the waste port. Once you get the CYA down and your own test kit you can fight this and win.

    While at Sams, get a flat and load it with about 7 or 8 cartons (3 jugs each) of bleach. You'll need at least that much to get you through shocking.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  15. Back To Top    #15

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: liquid bleach

    He's right. I buy two of the 3 jug containers every time I go to Sam's or Costco, just for normal maintenance. Buy a bunch and have the chlorine on hand for shocking, you'll be glad you did. At first it is going to go through chlorine really fast, as in when you start you will want to check it once an hour and keep it at shock level until it starts to stabilize a bit. Then you can raise it back up less frequently, as in once before bed and again when you get up in the morning.
    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!

  16. Back To Top    #16

    Re: liquid bleach

    Quote Originally Posted by mjwilliams81
    Started draining last night, (vacuum to waste) and added more water this morning. Going to vacuum to waste again tonight and add more water and then run the numbers again.

    Correct me if I'm wrong, but this is the best plan of attack right? Get the CYA down before adding more things to the pool. Of course the lady at the pool store said all we need is to lower the pH. (Of course my husband didn't tell her the pool is green and we need to shock it.)

    I'm stopping by Sams after work to stock up on bleach to shock the pool when we get the CYA down.
    I cannot wait until my test kit comes in the mail!!
    I had the same situation you did. CYA levels were at 150 and i couldn't add enough chlorine to pool to even get it past 2 ppm. I went through 150 gallons of liquid chlorine in 1 week before finally draining and starting fresh. best thing i ever did.
    My advice is to completely drain the pool, if you are sure you are able to drain it without any underground issues, and then refill and start with fresh water.I did that 2 months ago and now only use bleach from Sam's club, and muriatic acid from Home Depot to keep my chlorine levels and ph in check.
    My pool is 34000 gallons and I use 1.5 gallons of bleach a day to keep levels just over 3ppm, which is where I want it to be.
    Drain, refill, adjust ph and total alkalinity and calcium hardness, and add stabilizer , and then chlorinate.

    If you are draining partially, it is possible that the algea bloom will grow faster than you can drain and get the cya levels down to about 30.
    34000 inground gunite / plaster pool 6 years old with spa. De filter system using fiber clear.

  17. Back To Top    #17

    Join Date
    May 2011
    Location
    Jackson, MS
    Posts
    27

    Re: liquid bleach

    I'm would like to avoid a complete drain. But if that's the only way, then its the only way.

    We found out that at the house we are renting, water is almost $5.00 per 100 cubic foot of water.
    Northern who moved to the south and now has a pool!

    25,000 gallon pool - plaster
    Purex Triton sand filter

  18. Back To Top    #18
    ivyleager's Avatar
    Join Date
    Sep 2007
    Location
    Raleigh-Durham,NC
    Posts
    489

    Re: liquid bleach

    Quote Originally Posted by mjwilliams81
    I'm would like to avoid a complete drain. But if that's the only way, then its the only way.

    We found out that at the house we are renting, water is almost $5.00 per 100 cubic foot of water.
    Holy shazam, batman! That's expensive water. Sorry.
    CaryB
    36 x 18 IG vinyl, 25K, 1 HP pump, sand filter
    1 skimmer, 2 returns, no main drain
    Old school: PoolSolutions test kit

  19. Back To Top    #19

    TFP Guide

    chiefwej's Avatar
    Join Date
    Jun 2011
    Location
    Tucson
    Posts
    2,853

    Re: liquid bleach

    Quote Originally Posted by mjwilliams81
    I'm would like to avoid a complete drain. But if that's the only way, then its the only way.

    We found out that at the house we are renting, water is almost $5.00 per 100 cubic foot of water.
    That should make the cost of a complete refill of your 25,000 pool about $170. One cubic foot equels 7.48 gallons so 25,000 / 748 X $5.00 = $167.11 That could be a lot cheaper the many, many jugs of bleach. One trip to a pool store is more than that.
    chiefwej
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

  20. Back To Top    #20

    Join Date
    May 2011
    Location
    Jackson, MS
    Posts
    27

    Re: liquid bleach

    Quote Originally Posted by chiefwej

    That should make the cost of a complete refill of your 25,000 pool about $170. One cubic foot equals 7.48 gallons so 25,000 / 748 X $5.00 = $167.11 That could be a lot cheaper the many, many jugs of bleach. One trip to a pool store is more than that.
    Yeah - I was thinking about it earlier and I guesstimated that with my current CYA levels I would be looking at $300+ in bleach to shock my pool to get rid of the algae. And then I'd still have a high CYA level to deal with.

    I'm just frustrated that no one at the pool store ever mentioned my CYA level being high. One of the last times we tested at 115 and they didn't raise an eyebrow. In fact they gave us a sticker and didn't told us our numbers were great! If they would of told us about it we would of stopped using the pucks all together and the last time we vacuumed, we would of vacuumed to waste instead of to filter to 'conserve water'. Butterfly mentioned it on here, but I didn't completely understand the relationship between CYA and Chlorine at that time, so needless to say, it was only a matter of time for the algae to start because we weren't maintaining a high enough level.

    I let the pool drain for about 3 hours and am beginning to fill it back up again. My plan is to shock it in the morning.
    Silly questions, but I still have some bags of shock....can I add liquid bleach AND shock at the same time?
    Northern who moved to the south and now has a pool!

    25,000 gallon pool - plaster
    Purex Triton sand filter

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •