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Thread: Is this TDS high? Leslie's kind of scared me...

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    Is this TDS high? Leslie's kind of scared me...

    Hello Experts:

    Thanks to this awesome forum, I have been managing my pool for over a year now, following BBB method. Pool is nice and clean (even though couple of times, I have been negligent and allowed FC to go to zero). Hopefully, I will not let that happen again.

    Anyhow, I had to go to Leslie's to buy a small part for my sweep, so I thought that I will let them test my water too..just to see how they compare

    Their results were different than my results (as expected ) ), but one thing that I dont test and Leslie's guy threw me off-guard was TDS.

    He looked at TDS result and asked me if I have been using liquid chlorine. When I said yes, he told me that my TDS level is 2000 (they say it should be below 2500), and that liquid chlorine has so much salt that it raises the TDS, and only way to bring it down is to drain and refill. Do I need to worry about TDS? If yes, what can I do to stop it from increasing further?

    Also, lately, pH has been steadily going up..there is another thread where someone posted same issue, so I will keep an eye on that thread.

    Test results from latest testing are:

    pH: 7.8
    FC: 3.5 ppm,
    CC: 0
    CH: 330
    TA: 80
    Nitrates: Absent (per Leslies)
    CYA: Didn't test this last time.

    Thanks in advance for your help guys!!
    ----------------
    9,700 gallon, in-ground pool, Cartridge filter, Irregular (kidney) shape, Taylor K-2006 test kit, small rock waterfall.

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    Mod Squad Bama Rambler's Avatar
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    Re: Is this TDS high? Leslie's kind of scared me...

    The majority of the TDS is from salt which is benign. Don't worry about it at all.

    If they say it has to be below 2000 ppm what do they tell swg users who's salt content has to be 3000+?
    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
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    Re: Is this TDS high? Leslie's kind of scared me...

    Well, to be fair to Leslie, he did mention about getting salt system which generates chlorine from the salt in water. He said that this system costs about $600..and it will cost me ~$500 to drain and refill the pool (his numbers), I havent checked it yet.

    Also, they say it has to be below 2500..may be I was not clear in my original post..sorry!!

    Quote Originally Posted by Bama Rambler
    The majority of the TDS is from salt which is benign. Don't worry about it at all.

    If they say it has to be below 2000 ppm what do they tell swg users who's salt content has to be 3000+?
    ----------------
    9,700 gallon, in-ground pool, Cartridge filter, Irregular (kidney) shape, Taylor K-2006 test kit, small rock waterfall.

    Pool School + Test Kit + Test Kit Directions +The Pool Calculator = A TROUBLE FREE POOL

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    Re: Is this TDS high? Leslie's kind of scared me...

    Simply, TDS is not relevant to your pool water management....period

    Leslie's either doesn't know that or doesn't want you to know it.....either way, stay out of the pool store.....you are only inviting the misinformation and confusion you are currently experienceing.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Mod Squad Bama Rambler's Avatar
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    Re: Is this TDS high? Leslie's kind of scared me...

    Sorry about the 2,000 vs. the 2,500 but the statement is still valid.

    Don't fall for their hype. If you do decide to go with a swg pool just have your water tested for salt and add whatever you need from there.

    My salt level runs between 1500 and 2000 ppm and I'm using bleach. Never has been a problem and never will. They'd go absolutely nuts of they saw my numbers, I have absolutely zero CH and my TA runs right at 70 ppm.
    Dave J. TFP Moderator
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    Re: Is this TDS high? Leslie's kind of scared me...

    If you have no water dilution at all, the salt level will rise each year so what I do is use winter rains to dilute the pool water. For me, that keeps my salt level in the 1000-1500 range. Salt isn't a problem until it gets to much higher levels. Even then, it is more of a problem in some areas and situations than others, such as where splash-out and evaporation in soft stone can cause it to deteriorate or in pools with inferior stainless steel or other metal components.
    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
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    linen's Avatar
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    Re: Is this TDS high? Leslie's kind of scared me...

    As the others said, ignore tds it really tells you nothing. However, one component of tds that is important that you did not post which is cya. What and when was your (not leslies) last reading?

    As for your rising ph, do you have any water features that areate the water? How fast is your ph rising?

    For that matter, if those are not your test results above, post yours.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Is this TDS high? Leslie's kind of scared me...

    The easiest solution is to never let the pool store test your water ever again.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
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    Re: Is this TDS high? Leslie's kind of scared me...

    Thanks guys..I am not worried about TDS anymore

    Linen: Those are my test results, except Nitrates which is Leslies.

    Linen: I dont test my water daily (just look at it to see how the water appears), but it seems that pH goes up by 0.4 -0.6 units every 5-10 days. We do have a water fall, but dont use it that much.

    Chem geek: that's what my plan is, to use winter rain to dilute the pool water, which will automatically bring TDS down.

    I will post CYA results soon...
    ----------------
    9,700 gallon, in-ground pool, Cartridge filter, Irregular (kidney) shape, Taylor K-2006 test kit, small rock waterfall.

    Pool School + Test Kit + Test Kit Directions +The Pool Calculator = A TROUBLE FREE POOL

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    Re: Is this TDS high? Leslie's kind of scared me...

    Like others have said TDS is a meaningless number these days used by pool stores to scare you, TDS is total dissolved solids, which includes salt, CYA and others, but does not tell you the ratios, at one point in time before there were separate tests for salt and CYA, TDS was used as an possible indicator of over stabilization, but since it measures multiple things you can see how this was unreliable. So like many pool store scare tactics this one too is filled with half truths, yes bleach adds chlorine plus salt to the water, but no it is not a problem at least not at levels you are likely to ever reach, just look at their possible solutions to your "high salt" issue, replace water or buy a SWG and add yet more salt.

    Ike
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    Re: Is this TDS high? Leslie's kind of scared me...

    Leslie's sales tactics 101: Fear, uncertainty, and doubt.
    Matt
    9k gallon, plaster, IG. Raised spa w/ spillover into pool. AO Smith Century Centurion / Purex Triton WisperFlo 0.5 HP, Hayward 1.5 HP (spa), Polaris 1-516-01 1.5 HP (blower). Hayward DE3620 36 ft2 72 GPM DE Filter, Polaris 145 cleaner. Pool built ~1980.
    Trouble-free, BBB since: April 25, 2013

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