Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 9 of 9

Thread: Is all Bleach the same?

  1. Back To Top    #1

    Join Date
    May 2008
    Location
    North Carolina
    Posts
    79

    Is all Bleach the same?

    HAPPY FOURTH OF JULY!!!

    This week Clorox was on sale so we went with that instead of the Walmart brand. The bleaches are the same colors, same 6%, virtually the same packaging. So how come after three days of Clorox use, our clear pool is crystal clear? We can count the number of dirt particles on the floor of the deep end. My parents who oohed and ahhed over the pool this weekend, came by last night and asked how we got it even better.

    My husband thought maybe it's the Clorox. Is this even a reasonable conclusion? My way of thinking is that it is probably the same bleach from the same factory with the different label, but I can't argue with the results.

    Thanks!

    Branden
    16 X 34 21,000 IG Vinyl Liner
    1 1/2 Hayward SuperPump
    New Sand Filter (had cartridge - hated them)

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,085

    Re: Is all Bleach the same?

    Clorox adds sodium polyacrylate to their bleach, which might serve to remove some minerals from the water in a pool. It seems some people with iron have seen a brown sediment when using Clorox. I've never seen anybody post anything about negative effects of using Clorox, nor have I seen anything quantitative to indicate it removes minerals.

    As far as sanitizing, bleach is bleach if the sodium hypochlorite percentage is the same. Water clarity is mostly due to filtration IF the pool chemistry is good.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Is all Bleach the same?

    My guess is that the house brand was not quite full strength and so you have been using lower FC levels than you thought you were. But it could just be a coincidence.

    Clorox seems to take more care to insure that their bleach is pure and full strength. All of the bleach is no doubt made in the same place(s), but not with the exact same set of procedures. Plus, Clorox is usually shipped more quickly and replaced on the shelf more quickly.

    Even Clorox can have lower than advertised strength sometimes. Some people test each batch of bleach they buy to be sure.
    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

  4. Back To Top    #4
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: Is all Bleach the same?

    Well, just for add'l info: We can also
    Quote Originally Posted by branchop
    ...... count the number of dirt particles on the floor of the deep end.
    .....and we use Tundra from Aldi's. 8) They have a lot of product turnover, too.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  5. Back To Top    #5

    Join Date
    Mar 2007
    Location
    Texas
    Posts
    444

    Re: Is all Bleach the same?

    Quote Originally Posted by JasonLion
    My guess is that the house brand was not quite full strength and so you have been using lower FC levels than you thought you were.
    But if you are testing and you get the same FC reading from your test then you would be using the same FC levels, correct? I am NO chem expert by a LONG shot, so I may be looking (sounding) like an idiot .
    27' Round AG, 17,200 gallons, sand filter

  6. Back To Top    #6

    Join Date
    May 2008
    Location
    North Carolina
    Posts
    79

    Re: Is all Bleach the same?

    Quote Originally Posted by Poolidiot
    Quote Originally Posted by JasonLion
    My guess is that the house brand was not quite full strength and so you have been using lower FC levels than you thought you were.
    But if you are testing and you get the same FC reading from your test then you would be using the same FC levels, correct? I am NO chem expert by a LONG shot, so I may be looking (sounding) like an idiot .

    I'm in the idiot boat with you then. Everything is the same except the bleach. Weirdest thing. I don't care - I Like it! But now am going to have to shell out the extra .40 for Clorox now
    16 X 34 21,000 IG Vinyl Liner
    1 1/2 Hayward SuperPump
    New Sand Filter (had cartridge - hated them)

  7. Back To Top    #7

    Re: Is all Bleach the same?

    Quote Originally Posted by JasonLion
    My guess is that the house brand was not quite full strength and so you have been using lower FC levels than you thought you were. But it could just be a coincidence.

    Clorox seems to take more care to insure that their bleach is pure and full strength. All of the bleach is no doubt made in the same place(s), but not with the exact same set of procedures. Plus, Clorox is usually shipped more quickly and replaced on the shelf more quickly.

    Even Clorox can have lower than advertised strength sometimes. Some people test each batch of bleach they buy to be sure.
    Clorox has their own plants. All bleach used for laundry purposes follows the same basic manufacturing process but can differ a bit from plant to plant even within the same company. Regardless, the main potential problem with bleach quality comes from metal contamination. You will find metal contamination in a lot of "industrial" bleach but not Clorox or laundry brands that you can buy at the supermarket.
    21' Leslies Beachland Ag Pool, 10,000 gallons, professionally installed (best money I ever spent) Hayward 16" sand filter w/Pentair two speed pump Fafco 4x20 solar heater,Aqua Trol RJ. Borates added. Hard plumbed.

  8. Back To Top    #8

    Join Date
    Feb 2008
    Location
    Denton, TX
    Posts
    5,061

    Re: Is all Bleach the same?

    How does one test the bleach to determine if the percentage of sodium hypochlorite listed on the container label is matching up with the actual concentration in solution in the container. Can this be done with distilled water and a FAS/DPD test?

  9. Back To Top    #9
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Is all Bleach the same?

    Typically, you measure the FC level and then add the calculated amount of bleach. If your bleach is weak that will result in lower than expected FC levels. If you wait an hour and then test the FC level again, you can see if you are hitting your target level, which will give you a rough idea of how strong the bleach is.

    I am not saying that Clorox is the only bleach you should use. Most of the house brands are just fine. All bleach loses strength over time. Clorox is more diligent than most to be sure their bleach is fresh and full strength, but most of the other brands are just fine.

    Every now and then you find some bleach that is distinctly weaker than what it is labeled. There was recently a case with a dollar store selling bleach that was pretty much just salt water, no FC, presumably because it had been sitting around for years. That is an extreme example. Much more commonly there is a slight loss of strength. Every now and then, most often with Clorox, you find some that is stronger than it is labeled.

    To test the strength of bleach you need to be able to do large dilutions accurately. If you do a 5,000 to 1 dilution and use the FAS-DPD test normally (such that each drop would normally count as 0.5) then each drop will count as 0.25%. One good way to do this is with a syringe (without needle), often sold for measuring baby medicine, and a 1 liter soda bottle. 1 cc into 1 liter is 1,000 to 1. Then 2 cc of that and 8 ml of water into your 10 ml FAS-DPD test vial will give you 5,000 to 1. Remember that you need to use chlorine free water for the dilution (typically distilled water). Some people prefer to do 10 cc into 1 liter twice (100 to 1 twice is 10,000 to 1) and then do the FAS-DPD test so that each drop would normally be 0.2, then each drop is 0.2%. Through cleaning of the syringe that held full strength bleach is essential, least there be contamination down the line (or just use a different syringe for each step).
    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

Posting Permissions

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