Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: Alternative sanitizers

  1. Back To Top    #1

    In the Industry

    Join Date
    Jul 2009
    Location
    London and France
    Posts
    574

    Alternative sanitizers

    Topic split off from this thread:http://www.troublefreepool.com/alter...rs-t16470.html

    The frog just like Nature 2 sounds too unreliable regarding the dosing of copper which has to be tightly controlled.

    I wish I could have got some figures from the other thread that had just suffered staining.


    MikeInTN, the low chlorine system works as far sanitisation goes but the frog and nature 2 units are just not controllable enough.

  2. Back To Top    #2
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,963

    Re: Alternative sanitizers

    Quote Originally Posted by teapot
    MikeInTN, the low chlorine system works as far sanitisation goes but the frog and nature 2 units are just not controllable enough.
    I don't agree at all. If ones CYA is as low as 30, even attempting to try maintaining a FC of .5-1 is not going to accomplish a sanitary pool, in any pool. Especially systems like Frog/N2 where you would likely be unsuccessful using tablets to do so (the basis of the Frog/N2 systems). What ends up happening is you simply "turn up the dial" which causes the trichlor to dissolve faster and in turn drives the CYA up even further. They instruct you to shock the pool weekly! Why is that? Because they KNOW their system DOESN'T WORK.

    Even if one were using bleach instead, with a CYA of 30 you would likely be adding bleach several times a day trying to maintain such a low residual.

    I respect your right to experiment with an ionizer and MPS on your pool, but to state that low chlorine systems "work" is just not true, in my personal opinion (having lived it) .
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887

    Re: Alternative sanitizers

    If you keep reasonably careful control over the copper level and very careful control over the PH, it is quite possible to use a copper based system to reduce chlorine consumption. The big problem with this approach comes when people with light hair colors swim in the pool, and get green hair, or when the PH control fails and the PH goes up, which leads to staining that is very difficult/expensive to remove.

    It is not possible to lower the FC level below about 2 ppm safely (give or take special extreme circulation systems), even with any combination of copper/silver/zinc. When FC levels get too low, the chlorine can all be used up by just a couple of people entering the pool, person to person disease transmission becomes possible, and the pool is no longer sanitary.
    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

    In the Industry

    Join Date
    Jul 2009
    Location
    London and France
    Posts
    574

    Re: Alternative sanitizers

    I agree in principle with the points you are both making, certainly in the case of the Frog and nature 2 there is no understanding from the manufactueres of the CYA/chlorine link so a low chlorine level with 30ppm cya will render such a low residual almost dormant. On that basis probably only suitabe for an indoor pool but the costs for both of those units are too high IMO

    JasonLion any two people who used up all that chlorine would be way to dirty to get in my pool, it's a swimming pool not a bath!
    It is only a small percentage of the chlorine that actually does the sanitisation 10-20%, the remainder is oxidising sweat, urea, dead skin cells and sun cream etc.

    If people showered before they enter a pool then we would all lower our chlorine usage.

  5. Back To Top    #5

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,085

    Re: Alternative sanitizers

    Though normal pool use won't consume a lot of chlorine under light bather loads, local depletion can occur from kids (or adults, for that matter) who urinate in the pool, though after enough mixing with the rest of the bulk pool water the chlorine levels will mostly rise again. High bather loads use a lot of chlorine as any user of hot tubs will attest since that is typically a high bather load situation.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

  6. Back To Top    #6

    In the Industry

    Join Date
    Jul 2009
    Location
    London and France
    Posts
    574

    Re: Alternative sanitizers

    Very true Chem geek,

    You already know my thoughts on sitting in a hot tub breathing in all those chlorine by products. If ever there was a case for alternative sanitiser that must be it, high bather load, low volume of water and much hotter than a pool. That lovely cloud of noxious gaseous substance.

Posting Permissions

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