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Thread: New Member Chlorine nitrates issues

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    New Member Chlorine nitrates issues

    25k gal plaster pool nitrates: 50 FC: 0.47 TC:2.15 CC:1.68 PH:7.8 H:223 TA:82 CYA 27 TDS:590 add at night 7.5lb super pool treat (Sod Dichlor) next day test, FC: 0.7 TC:2.85 CC: 2.15 ph 7.4 H:230 TA: 46 CYA: 40 TDS:600 that night added 5 gal liquid shock (12.5% sod hypochlor) and alb baking soda ,next day test, FC:0.9 TC:5.06 CC:4.17 PH 7.4 H:243 TA 58 CYA: 41TDS 630 Am I fighting a losing battle by shocking nightly to get FC up and CC to peak and reverse? or just replace water? Thanks

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    Mod Squad jblizzle's Avatar
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    Re: New Member Chlorine nitrates issues

    Welcome to TFP!

    Where are those results coming from? They are showing changes that are just not possible.

    With the high CC numbers, you should follow the SLAM process that is described in Pool School and that requires one of the recommended test kits.
    Jason, TFP Moderator
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    bridgman's Avatar
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    Re: New Member Chlorine nitrates issues

    Sorry if this is a dumb question but where do "nitrates" fit in here ?
    Cedar hot tub, 680 US gallons - Snorkel wood-burning heater, canoe paddle, "offline" Intex 1000 GPH pump/filter with skimmer

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    Re: New Member Chlorine nitrates issues

    Pool Store

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    Re: New Member Chlorine nitrates issues

    Not sure but with high Nitrates was told Chlorine not effective? yes no

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    Mod Squad jblizzle's Avatar
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    Re: New Member Chlorine nitrates issues

    No...
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    JesseWV's Avatar
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    Re: New Member Chlorine nitrates issues

    Algae feeds on nitrates and phosphates.

    A properly chlorinated pool will have no algae to feed.

    If your pool is not properly chlorinated and you already have algae, the presence of nitrates/phosphates will allow the algae to reproduce faster. It will take MORE chlorine but only because there is MORE algae.

    It has nothing to do with nitrates reducing chlorine's effectiveness.
    16k gal, 28'x3.5', Vinyl A/G, 1hp Pentair Dynamo 2-speed Pump, Hayward S160T Sand Filter, Intermatic HB800RCL Digital Timer, Intex 8110 SWG, TF-100 Test Kit, SpeedStir Author: Jesse's Graphical Pool Testing Log

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    JesseWV's Avatar
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    Re: New Member Chlorine nitrates issues

    Also, I wouldn't put much faith in Pool Store test results. They can be all over the place using the same sample water. Also, remember, they are in the business of selling chemicals.

    We highly recommend you invest in a good test kit. Most will recommend the TF-100 or the smaller K-2006. Once you obtain a proper kit, you'll be able to get accurate results and begin taking control of your pool.

    In the meantime, start reading Pool School by clicking the link on the upper right of the page.
    16k gal, 28'x3.5', Vinyl A/G, 1hp Pentair Dynamo 2-speed Pump, Hayward S160T Sand Filter, Intermatic HB800RCL Digital Timer, Intex 8110 SWG, TF-100 Test Kit, SpeedStir Author: Jesse's Graphical Pool Testing Log

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    Richard320's Avatar
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    Re: New Member Chlorine nitrates issues

    Wow. There's a lot here.

    I'll tell you the problem in a nutshell. You're letting the pool store test your water and sell you a whole bunch of stuff. That's the problem.
    nitrates: 50
    FC: 0.47
    TC:2.15
    CC:1.68
    PH:7.8
    CH:223
    TA:82
    C
    YA 27
    TDS:590

    That's your starting point. We ignore nitrates, phosphates, and total dissolved solids. So what's left is a cloudy, possibly green, pool with a lot of Combined Chlorine and inadequate Free Chlorine for the CYA level.

    Then you dumped in a bunch of dichlor, which temporarily raised the FC but it was all gone before it got retested. But it also raised the CYA level and lowered the pH. The increase in Combined chlorine shows something is in there eating the free chlorine.

    Next, a massive dose of liquid shock. That should have shoved FC up to 25. It didn't. Instead, your Combined Chlorine jumped a whole lot.

    Surprisingly, the CYA numbers aren't too far from what could be expected with that amount of Dichlor. You may actually be at 40ish CYA, which is a good level for what comes next.

    What you need is the Shock Level And Maintain Process. That is what you've been doing with the bleach, but more consistently. Like, every hour or two instead of once a day. Test, replenish, brush. Test, replenish, brush. It requires a lot of bleach and a proper test kit that can measure FC levels up in the vicinity of 15-20. That leaves two choices: the TF100 or the Taylor K-2006. For what you have ahead of you, the best value is the TF100 with the XL option.

    No more powders. Liquid bleach/shock only for the SLAM.

    It can be done. Here's some proof. Look at the pictures!
    http://www.troublefreepool.com/threa...urn-to-a-swamp
    http://www.troublefreepool.com/threa...numbers)/page2 post 37 especially
    http://www.troublefreepool.com/threa...ool-is-winning
    http://www.troublefreepool.com/threa...-to-Clean-tale
    http://www.troublefreepool.com/threa...28-TFP-Success

    Just do what they did.
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    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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    Re: New Member Chlorine nitrates issues

    Thanks Richard will get the TF100 with xl options appreciate pool is very clear no issue only CF TC CC

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