Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 11 of 11

Thread: What is E.C.O.?

  1. Back To Top    #1
    schertzy82's Avatar
    Join Date
    May 2012
    Location
    Peoria, IL
    Posts
    100

    What is E.C.O.?

    I think my Intex SWG is on its last legs. Keeps displaying low salt even though the cell has been cleaned and my salt level is around 3300 ppm. This will be its 5th summer. The cheapest one on Amazon is the newest model and it has Electrocatalytic Oxidation (E.C.O.) What on earth is that? It has its own electrode and cable running to it, just like the copper model has. Here is the manual's description:

    "The Electrocatalytic Oxidation is an advanced oxidation process. When direct current is applied to the electrocatalytic electrodes, water will be discharged to generate "hydroxyl radicals." The hydroxyl radical is a powerful oxidant which oxidizes organic contaminants and destroys bacteria and algae. Hydroxyl radicals in combination with free available chlorine provide the strongest and safest pool water sanitation."

    Sounds like it's producing some kind of oxidizer, which I thought chlorine did anyway. Are there any downsides to this like copper and ozone have? If I get this model, should I use this fancy new E.C.O or should I unplug the electrode like I did with the copper? Or should I just fork over an extra $15 bucks for the copper model? Any thoughts?
    Intex 18ft x 52in Ultra Frame Pool, hard plumbed w/skimmer and fountain
    Intex 4000 gph cartridge filter pump
    Intex SWG

  2. Back To Top    #2


    TFP Guide
    jeffchap's Avatar
    Join Date
    Jun 2012
    Location
    Edmond OK
    Posts
    1,373

    Re: What is E.C.O.?

    You can get a replacement cel for your current unit on the Intex website for $68 plus shipping.
    25000 gallon free-form gunite
    Jandy Stealth pump/CL340 cartridge filter
    Pentair IC40 SWG
    Pentair MasterTemp 250HD heater
    Jandy AquaLink RS automation

  3. Back To Top    #3
    n240sxguy's Avatar
    Join Date
    May 2014
    Location
    Benton, KY
    Posts
    1,800

    Re: What is E.C.O.?

    I was wondering about the ECO feature also. Based on some searches I did a couple weeks ago when I first saw it, it makes some kind of hydroxyl radicals that are good oxidizers. Hopefully someone who actually knows what they're talking about will come along and fully enlighten us all.


    30K gallon IG vinyl. 1.5HP 2-speed Waterway Mustang pump. 600 lb sand filter. Polaris 280. Circupool SI-60+. TF-100

  4. Back To Top    #4
    schertzy82's Avatar
    Join Date
    May 2012
    Location
    Peoria, IL
    Posts
    100

    Re: What is E.C.O.?

    I've looked on Intex's website. Did not find a replacement cell anywhere. I know they used to have it available, but it doesn't seem to be there anymore.
    Intex 18ft x 52in Ultra Frame Pool, hard plumbed w/skimmer and fountain
    Intex 4000 gph cartridge filter pump
    Intex SWG

  5. Back To Top    #5

    TFP Guide

    Azgirl71's Avatar
    Join Date
    Apr 2015
    Location
    Sierra Vista, Az
    Posts
    2,586

    Re: What is E.C.O.?

    I cannot find them for mine either. I think it is because mine is a discontinued model.
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

  6. Back To Top    #6
    JoyfulNoise's Avatar
    Join Date
    May 2015
    Location
    Tucson, AZ
    Posts
    11,588

    What is E.C.O.?

    I'd say it's a marketing trick. ECO is the process of turning salt water into chlorine gas, hydrogen gas and hydroxide. This is the ECO reactions that occurs in an SWG cell -

    2 Cl- + 2 H2O. --> Cl2 + H2 + 2 -OH

    chloride + water --> chlorine + hydrogen + hydroxide ion (hydroxyl radical)

    At one electrode, the chloride ion (as in sodium chloride) is oxidized into chlorine, ie, it's oxidation state is raised from -1 to 0. At the other electrode, water molecules are split into hydrogen and hydroxyl ions. ChemGeek's posts in The Deep End have the more detailed electrochemical reactions in them.

    So I'm not sure exactly what Intex is getting at here. Do they actually have two electrodes? Are they coating them differently? Do they still have the Cu electrode? Are they just trying to sound fancy and charge people more? Hard to say just looking at sales literature.


    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

  7. Back To Top    #7

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,082

    Re: What is E.C.O.?

    In the previous post, the negatively charged hydroxide ion (OH-) is not the same as the uncharged hydroxyl radical (OH•). A regular saltwater chlorine generator does not produce many hydroxyl radicals.

    If they are using a boron-doped diamond electrode, then it isn't a marketing gimmick and it would produce a larger number of hydroxyl radicals that are strong but short-lived oxidizers. It's fine to leave that electrode installed.

    However, I find it surprising that they can offer this at such a low price since such electrodes are pricey (though Pro Aqua from Austria has lower cost electrodes). It could instead be the case that they are using uncoated titanium electrodes that would largely produce oxygen gas and only a limited number of hydroxyl radicals. These uncoated titanium electrodes would also produce a small amount of chlorine, but not nearly as much as the regular titanium electrodes that are coated with ruthenium oxide (or sometimes a mix also with iridium oxide and titanium oxide) that lower the activation energy (overvoltage) for chlorine production.

    I'll bet that they aren't really using boron-doped diamond electrodes and are stretching the truth with regard to hydroxyl radicals. If that is the case, then it's not that useful and is just increasing aeration of the water and therefore the rate of pH rise.

    This link gives specifications for various Intex systems where the E.C.O. 7110 outputs 5 g/h chlorine (0.26 pounds chlorine per 24 hours) and the E.C.O. 8110 outputs 12 g/h (0.63 pounds chlorine per 24 hours). Since that chlorine output is similar to earlier systems, I don't think their ECO electrode is producing any significant amount of chlorine. I'd leave the electrode in unless we find out with certainty that it is just producing oxygen gas and not significant amounts of hydroxyl radicals.
    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"

  8. Back To Top    #8
    schertzy82's Avatar
    Join Date
    May 2012
    Location
    Peoria, IL
    Posts
    100

    Re: What is E.C.O.?

    I haven't actually seen it, just pictures online and a description from the online manual. There does appear to be a separate electrode for it, at the outlet end. No mention of copper in the manual, so they must have gotten rid of that and replaced it with the ECO. It does sound like a marketing trick to me, but I'm just wondering if the unit will still output enough chlorine with the ECO unplugged if it's essentially doing the same thing as the cell. Did they perhaps just split the normal cell into two pieces and try to market it as a fancy new technology or something? Strangely, this model is cheaper than the previous one, at least on Amazon it is. Haven't checked Walmart or Target or other stores. Should I just get this model and run it as-is if it's basically the same as a normal SWG cell? I was mainly concerned if the ECO has any negative side effects, like the copper and ozone models do.
    Intex 18ft x 52in Ultra Frame Pool, hard plumbed w/skimmer and fountain
    Intex 4000 gph cartridge filter pump
    Intex SWG

  9. Back To Top    #9
    schertzy82's Avatar
    Join Date
    May 2012
    Location
    Peoria, IL
    Posts
    100

    Re: What is E.C.O.?

    Ah, thanks chem geek. You just answered my previous questions. Ok it sounds like I can just run it without worrying about the ECO or unplugging it. If the only negative is pH rise, then that's not a big deal. I'm constantly lowering my pH anyway due to my SWG and my water's very high TA.
    Intex 18ft x 52in Ultra Frame Pool, hard plumbed w/skimmer and fountain
    Intex 4000 gph cartridge filter pump
    Intex SWG

  10. Back To Top    #10
    Patrick_B's Avatar
    Join Date
    Jun 2011
    Location
    Midland TX
    Posts
    15,001

    Re: What is E.C.O.?

    Indeed, thanks for the explain Richard.
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

  11. Back To Top    #11
    Scuba_Steve's Avatar
    Join Date
    May 2015
    Location
    Pooler, GA
    Posts
    311

    Re: What is E.C.O.?

    I have been wondering the same thing. Thank you very much!
    6425g Intex Ultraframe 18'x48" AG
    Stock 1500gph cartridge filter / Intex SWG CG-28669 with E.C.O.
    Install date: 5/26/2015
    TF-100
    Helpful Links

Posting Permissions

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