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Thread: please help me with my numbers

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    please help me with my numbers

    Thanks in advance for all of your advice!

    I opened my pool this weekend to water that was just beginning to cloud up and I dumped some of the pool cover water in
    oh well, stuff happens! Anyway, we filled it back up to the mid skimmer level and turned on the pump. After testing the water I had low ph 6.8 and .5 CC, 0 chlorine, CYA of less than 20 it was clear all the way to the top of the tube and a TA of 100. I am not sure if this makes a difference, but I used last years testing kit (TF100) and the R0870 powder was kind of crystally.

    Anyway I added some shock I had from last year's supply that the pool store gave us when we bought our pool. The next day it was clear and my readings were:

    ph 7.0
    CC .5
    FC 4.5
    TA 130

    I added about a cup of chlorine and 2 lbs of stabilizer in a sock near my return. My over night test showed a chlorine loss of about 1 - 1.5 and a CC of .5 I know I'm not supposed to test my CYA yet,but I couldn't help myself. It clouded up and I think I am near 20.

    My question is after all of this should I continue to shock the pool b/c of the iffy overnight chlorine loss? Should I use the new test kit I ordered or keep using my old one from last year, and should I add borax to raise my PH or just aerate? Also what order should I be doing all of this. Thanks!!!
    2014 13500 gal ag round Sentinelle pool 24x24x52, Hayward cartridge filter, 2.5 hp

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    Mod Squad tim5055's Avatar
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    Re: please help me with my numbers

    If your test kit was stored inside it should be fine.

    If you have an easy way to aerate I would do that. keep the FC around 5 and re-test the OCLT tonight.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: please help me with my numbers

    I aerate by turning the return nozzle up above the water line while the pump is on low. Would that be enough?
    2014 13500 gal ag round Sentinelle pool 24x24x52, Hayward cartridge filter, 2.5 hp

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    Mod Squad tim5055's Avatar
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    Re: please help me with my numbers

    Quote Originally Posted by New and confused View Post
    I aerate by turning the return nozzle up above the water line while the pump is on low. Would that be enough?
    You have already recorded a change form 6.8 to 7.0 sp as long as the rise continues, then yes.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    BoDarville's Avatar
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    Re: please help me with my numbers

    Last year's test kit reagents should be fine. I'm using some of last year's reagents from the TF100 and am getting reliable test results.

    should I add borax to raise my PH or just aerate
    Aeration will work - it may just take a little longer. Since pH is currently out of our recommended range, I would get it up to at least 7.2 using Washing Soda / Soda Ash (note: this is not the same as Baking Soda). Use the Pool Math tool to determine how much to add. Once you're at that level, aerating will help push it up a bit further without adding any more chemicals.

    The 2 lbs of granular CYA that you added should bring the CYA up to the high 30's. Although it may take up to a week for newly-added CYA to appear on a test, if it's been 24 hours or more since you added it, I would dose the FC assuming that the CYA is all in the pool. Use the Chlorine CYA Chart to determine the appropriate level of FC.

    You are definitely on the cusp of when we recommend to SLAM. But before committing to a SLAM, I would first keep FC on the high side of what we recommend for normal maintenance - maybe even a point or two higher for a day or so and then redo the Overnight Chlorine Loss Test. In situations like you are describing, maintaining a slightly elevated FC level for a day or so may be all your pool needs for coming out of its winter dormancy.
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
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    Re: please help me with my numbers

    Ok its been a week since I posted and I have not quite been slamming my pool (no time with work), but I have been upping the chlorine as my numbers were on the edge over the weekend. So my FC was 13.5 on Monday night with an overnight loss of 1 on Tuesday morning and a CC of.5,
    Tuesday night FC 12.5 and Wed. morning I kept getting different numbers from 10.5 to 12.5 (not sure why that is - I lost track a few times counting but still...) anyway CC was 0
    Wednesday night FC 12.5 CC 0 Thursday morning FC 12-12.5 with CC 0
    Thursday and today is where it went weird again
    Thursday night went to bed with a headache and left pool at FC 5.5 -6 and CC 0
    Today at 530 am FC 4.5 CC .5 ph 7.8 (I added a box of Borax last week to raise my ph from below 6.8) TA 140-150 and CYA was 50 (last week I add 2 lbs of stabilizer in a sock and it was gone by Sunday)

    I added chlorine and tested again at 830 am FC of 17.5 and my CC 0 When I came home and checked at 730 pm my FC was 8 CC.5 and TA 140-150 and my CYA was 20 (that's weird isn't it)

    I don't like that my CC keeps going to .5 and there may or may not be a 1.0 loss overnight -last year I never had my CC register until the end of the season - I slammed it before closing and my numbers went back to normal.

    I was going to SLAM it this weekend, test it every few hours and see what happens. What do you think?
    2014 13500 gal ag round Sentinelle pool 24x24x52, Hayward cartridge filter, 2.5 hp

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    Mod Squad pooldv's Avatar
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    Re: please help me with my numbers

    Sounds like a good plan. Or if your pool is clear you could Perform the Overnight FC Loss Test (OCLT) and see how that goes first.
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    Re: please help me with my numbers

    Ok here are my numbers for this morning. It has been raining out, so I am not sure if that effects anything.
    Last night:
    FC8.0
    CC .5
    TA 140-150
    CYA ?? was 50 Friday am, but Fri night was less than 20?

    This morning 630 am
    FC 7.5 -8.0
    CC .5 -0
    TA - 150 -160
    CYA 20

    AM I clear even with a CC of .5
    Can TA increase like that and why?
    What's the deal with my CYA?
    Last edited by New and confused; 05-30-2015 at 06:54 AM. Reason: format was off
    2014 13500 gal ag round Sentinelle pool 24x24x52, Hayward cartridge filter, 2.5 hp

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    Mod Squad pooldv's Avatar
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    Re: please help me with my numbers

    TA could increase a little from the aeration with the rain. Not sure about the CYA dropping, that is weird. Are you confident in following the test process? Is the water clear or cloudy? I think I would bump up FC to 10-12 for a couple of days. Are you trying to swim this weekend?

    What about PH?
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    Re: please help me with my numbers

    Thanks for responding - CYA test is hard - last year I don't think I ever got it above 20, but my chlorine levels were ok and CC never made it to .5 until end of season. Anyway this year when I had the reading of 50 it was definitely cloudy; I did it twice. This morning when I had the reading of 20 (or below) the water was cloudy in the tube, but the darned black dot never disappeared.

    My pool water is very clear but I probably won't be swimming this weekend temps in the 50's and raining. I do need to vaccuum, flower stems from pear tree are in the bottom of the pool and some residual dirt from last week's vacuuming settled back down.

    ph is 7.8 a little darker pink but not 8.2 that has been holding steady since Monday afternoon.

    also if you think I should raise my chlorine to 10 or 12 for a few days do you mean don't let it go past that i.e. slam?
    2014 13500 gal ag round Sentinelle pool 24x24x52, Hayward cartridge filter, 2.5 hp

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    Mod Squad pooldv's Avatar
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    Re: please help me with my numbers

    It is best to keep ph around 7.4-7.5. Yes, I would keep it at 10-12 for a while, especially since you can't swim anyway.
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    Re: please help me with my numbers

    Should I add acid to lower my ph or leave it for now?
    2014 13500 gal ag round Sentinelle pool 24x24x52, Hayward cartridge filter, 2.5 hp

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    Re: please help me with my numbers

    Yes, lower PH now before you are above 10 FC. Take it down to 7.2
    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

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    Re: please help me with my numbers

    I just added a gallon and a half of bleach 6% should I add the acid now too?
    2014 13500 gal ag round Sentinelle pool 24x24x52, Hayward cartridge filter, 2.5 hp

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    Re: please help me with my numbers

    Check to see if your FCis below 10. If it is then you can.
    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

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    Re: please help me with my numbers

    I just tested the FC was 6, I added a gallon and 1/2 - doesn't it register right away?
    2014 13500 gal ag round Sentinelle pool 24x24x52, Hayward cartridge filter, 2.5 hp

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    Re: please help me with my numbers

    The water has to circulate for about 30 mins. Your 6% may be weak.
    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

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    Re: please help me with my numbers

    just checked and its 16.5 (that was fast) so I didn't add the acid

    i thought 7.8 was within the parameters according to pool math - why did it need to be lowered?
    2014 13500 gal ag round Sentinelle pool 24x24x52, Hayward cartridge filter, 2.5 hp

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    Re: please help me with my numbers

    During a SLAM it is better to have PH at 7.2 when you begin. It will rise during the SLAM with aeration. It will likely be very high once you finish your SLAM. You could go ahead and add MA to target to lower it since you have your numbers from this morning. You won't be able to test it though until your FC is below 10 though. Your TA is high so it will rise back up.
    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

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    Re: please help me with my numbers

    Thanks - I will add some after the rain subsides.
    2014 13500 gal ag round Sentinelle pool 24x24x52, Hayward cartridge filter, 2.5 hp

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