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Thread: Newbie with high CYA - getting ready to pump water out

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    Question Newbie with high CYA - getting ready to pump water out

    Hi folks. Great resource. Wanted to get your thoughts before i pull the trigger.

    Testing from the LaMotte 2056 ColorQ Pro 7 Digital
    Free Chlorine - .36 ppm
    Total Alkalinity - 122 ppm
    Calcium Hardness - 90
    pH - 7.6
    Stabilizer - 84 ppm


    Testing from the Taylor FAS-DPD (just purchased):
    Total Chlorine and Free Chlorine both less than 0.5
    CYA - Between 80 and 90


    The suggestion from pool math was to drain about 50% of the water. We also have some algae spots and cloudy water. From what Iíve read, we should drain the pool first, test CYA again and then add water back. At that point, we SLAM. On the right track?
    Year:2000; 29k gallon IG pebble tec chlorine pool with spa; Pump: Pentair WhisperFlo High Performance 2HP single speed WF-28; Filter:Pentair FNS Plus D.E. FNPS60; Vacuum: Heyward PoolVac XL; WaterTester: Taylor FAS-DPD and ColorQ Plus 7 photometer digital

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    Mod Squad kimkats's Avatar
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    Re: Newbie with high CYA - getting ready to pump water out

    You sure are! So nice to see that you have already read some!

    Let us know when the drain and refill are done.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Texas Splash's Avatar
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    Re: Newbie with high CYA - getting ready to pump water out

    Welcome Skaggs! You do indeed have a good road map ahead:
    1 - Drain to adjust CYA
    2 - Adjust PH to 7.2
    3 - Implement SLAM

    After the SLAM, keep the TFP Chlorine/CYA Chart (link below) handy to ensure your FC NEVR drops below the minimum level. Keep in touch and let us know if you need any more help. Have a great day.

    - - - Updated - - -

    Oh, and maybe you already read or heard, but don't use any pool store tables, pucks, or "bags of shock" in your pool. That's what drives-up that CYA.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

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    Re: Newbie with high CYA - getting ready to pump water out

    So, I'm thinking of two options to drain. 1. Sump pump...can purchase at home depot or 2. use the waste mechanism from the filter. Before I do the latter, I'd like to get some advice on how to do this without breaking something. I'm posting some pics of the deep end of the pool and the relevant equipment. I think there is a main drain, but I don't know much. The waste option would require shutting off the skimmers, I understand. But, before I do anything, I'd appreciate any advice.

    - - - Updated - - -

    On the pool pucks and shock..yes I've read that. I'm going for the TFP method going forward. thanks for the feedback so far.
    Attached Images Attached Images
    Year:2000; 29k gallon IG pebble tec chlorine pool with spa; Pump: Pentair WhisperFlo High Performance 2HP single speed WF-28; Filter:Pentair FNS Plus D.E. FNPS60; Vacuum: Heyward PoolVac XL; WaterTester: Taylor FAS-DPD and ColorQ Plus 7 photometer digital

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    Re: Newbie with high CYA - getting ready to pump water out

    FYI- the "vac-lock" valve is the black lever toward the bottom center of the picture near the hose on the ground. It's currently opened up the skimmers and filter is running normally. I turn it 180 degrees counterclockwise once I plug in the vacuum and start up that process. ......from his wife.
    Year:2000; 29k gallon IG pebble tec chlorine pool with spa; Pump: Pentair WhisperFlo High Performance 2HP single speed WF-28; Filter:Pentair FNS Plus D.E. FNPS60; Vacuum: Heyward PoolVac XL; WaterTester: Taylor FAS-DPD and ColorQ Plus 7 photometer digital

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    DaninFLA's Avatar
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    Re: Newbie with high CYA - getting ready to pump water out

    you can vacuum to waste and attach a hose to drain the pool. like you said, make sure the skimmer is closed so you are only pulling from the main drain.

    are you planning on doing a full 50% drain? are you in Katy, texas? I would definetly check your water table before doing a large drain and refill. you don't want to float your pool. if you are planning on draining the pool say 3 feet, dig a test hole as close next to the pool as you can at least that deep. if you dig it down, and water doesn't start to collect then you are good. if it has standing water after a few hours, then don't go too much lower than the water level. this could require 2 smaller drains and refills.

    by the way, your pool doesn't look too bad. once you get your CYA under control I bet your SLAM wont take more than 3-4 days if you say on top of your testing and adding bleach.

    I would also be adding bleach right now to keep your FC at least at the target amount for your CYA. this will keep the algae from getting much worse and will shorten your SLAM.
    Dan
    9,000 gallon in-ground Saltwater pool, plaster, cartridge filer, 1.0 hp pump, Hayward T-15 SWCG, TF-100
    Pool School - Chlorine / CYA Chart; Pool School - Test Kits Compared;

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    Mod Squad kimkats's Avatar
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    Re: Newbie with high CYA - getting ready to pump water out

    Do you have a Harbor Freight? They have cheap sub pumps as well.

    I worry about my pump so do not drain that way. That is just me!

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: Newbie with high CYA - getting ready to pump water out

    Validated that the water table is 75 ft below the ground here. We have a Home Depot close to get a sump pump. I Think we are leaning towards using a sump pump.
    Year:2000; 29k gallon IG pebble tec chlorine pool with spa; Pump: Pentair WhisperFlo High Performance 2HP single speed WF-28; Filter:Pentair FNS Plus D.E. FNPS60; Vacuum: Heyward PoolVac XL; WaterTester: Taylor FAS-DPD and ColorQ Plus 7 photometer digital

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    Mod Squad kimkats's Avatar
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    Re: Newbie with high CYA - getting ready to pump water out

    It is nice to have around. I am a better safe than sorry kind of person.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: Newbie with high CYA - getting ready to pump water out

    So, I drained about 40% to 50% of the pool last night with a sump pump. The pic below was taken last night before I started to re-fill. I think it's upside down.



    So, I've refilled all day today and almost all the way back to the top.
    Question: Should I let the pump circulate the water for a while before taking my test? I've got my chlorine ready to kill some of the algae that's present with SLAM.
    Update: We just started the pump and are circulating the water throughout. Will take a test after about an hour. Hoping for CYA of 40 or 50. Fingers crossed.
    Last edited by skaggsjw; 06-19-2015 at 10:10 PM. Reason: taking action
    Year:2000; 29k gallon IG pebble tec chlorine pool with spa; Pump: Pentair WhisperFlo High Performance 2HP single speed WF-28; Filter:Pentair FNS Plus D.E. FNPS60; Vacuum: Heyward PoolVac XL; WaterTester: Taylor FAS-DPD and ColorQ Plus 7 photometer digital

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    Re: Newbie with high CYA - getting ready to pump water out

    Ok. Here are the test results post refill:

    Using ColorQ
    FCL = 0
    TCL = 0.1
    PH = 7.4
    TA = 103
    CA = 29
    CYA = 53 This is down from between 80 and 90 before 40% drain and refill

    Tested just CYA with Taylor and got something between 50 and 60.

    My plan to get rid of the algae spots is to SLAM using the Chlorine/CYA chart which tells me that shock level is 20 for CYA of 50. Plan to follow SLAM and will post progress. Using all liquid bleach from the store and following Pool Math guidelines with shock level as the target for FCL.

    Quote Originally Posted by skaggsjw View Post
    So, I drained about 40% to 50% of the pool last night with a sump pump. The pic below was taken last night before I started to re-fill. I think it's upside down.



    So, I've refilled all day today and almost all the way back to the top.
    Question: Should I let the pump circulate the water for a while before taking my test? I've got my chlorine ready to kill some of the algae that's present with SLAM.
    Update: We just started the pump and are circulating the water throughout. Will take a test after about an hour. Hoping for CYA of 40 or 50. Fingers crossed.
    Year:2000; 29k gallon IG pebble tec chlorine pool with spa; Pump: Pentair WhisperFlo High Performance 2HP single speed WF-28; Filter:Pentair FNS Plus D.E. FNPS60; Vacuum: Heyward PoolVac XL; WaterTester: Taylor FAS-DPD and ColorQ Plus 7 photometer digital

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    Re: Newbie with high CYA - getting ready to pump water out

    First test after adding the liquid chlorine.

    FAS-DPD
    FCL = 32.5 --> was shooting for something in the 20s
    CC = .5 --> it didn't feel like I needed to add anything but I'll go with 1 drop

    It looks like I may have overshot the Chorine add. But, we'll see what it looks like in the morning. I'll be keeping at shock levels all day and brushing and vacuuming.
    Year:2000; 29k gallon IG pebble tec chlorine pool with spa; Pump: Pentair WhisperFlo High Performance 2HP single speed WF-28; Filter:Pentair FNS Plus D.E. FNPS60; Vacuum: Heyward PoolVac XL; WaterTester: Taylor FAS-DPD and ColorQ Plus 7 photometer digital

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    Question Re: Newbie with high CYA - getting ready to pump water out

    Test from this morning:
    FAS-DPD
    FCL = 20 --> A drop of 12.5 from last night. That may be a bigger drop than the reality. I realize I may have put more drops of the reagent in than needed to get water back to clear on the TC test last night because I wasn't swirling the whole time, so 32.5 may have been an overstatement.
    CC = .5

    The water was pretty clear already and is more clear this morning. My DE filter's pressure is at 30 PSI. Should I backwash now? I read that I should add earth after each backwash, but I'm just getting familiar with this DE filter as it's new. Any suggestions? I haven't purchased any earth.

    Quote Originally Posted by skaggsjw View Post
    First test after adding the liquid chlorine.

    FAS-DPD
    FCL = 32.5 --> was shooting for something in the 20s
    CC = .5 --> it didn't feel like I needed to add anything but I'll go with 1 drop

    It looks like I may have overshot the Chorine add. But, we'll see what it looks like in the morning. I'll be keeping at shock levels all day and brushing and vacuuming.
    Year:2000; 29k gallon IG pebble tec chlorine pool with spa; Pump: Pentair WhisperFlo High Performance 2HP single speed WF-28; Filter:Pentair FNS Plus D.E. FNPS60; Vacuum: Heyward PoolVac XL; WaterTester: Taylor FAS-DPD and ColorQ Plus 7 photometer digital

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    Re: Newbie with high CYA - getting ready to pump water out

    Water as of now
    Attached Images Attached Images
    Year:2000; 29k gallon IG pebble tec chlorine pool with spa; Pump: Pentair WhisperFlo High Performance 2HP single speed WF-28; Filter:Pentair FNS Plus D.E. FNPS60; Vacuum: Heyward PoolVac XL; WaterTester: Taylor FAS-DPD and ColorQ Plus 7 photometer digital

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    Re: Newbie with high CYA - getting ready to pump water out

    you are doing great...

    DE filter: It will filter the best out of all filters, but you will need to clean it/backwash it the most out of all filters during a slam...
    you need to backwash/clean the filter when it raises 20 to 25% above normal, so after a thorough cleaning, write down your clean pressure and then you will know when 25% you backwash again...
    how you do a backwash or cleaning on a DE filter I have no idea, hopefully someone will let you know..

    scratch that, found this video

    Last edited by cowboycasey; 06-20-2015 at 08:28 AM. Reason: added video
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

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    Mod Squad kimkats's Avatar
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    Re: Newbie with high CYA - getting ready to pump water out

    You have a VERY good handle on what you are doing already! Nice job!

    You need to get some DE. I am a sand filter person so cannot really tell you how much or when to do what you need to do but I do know you need to get some DE.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: Newbie with high CYA - getting ready to pump water out

    Thanks for the encouragement. I'm getting some earth today. We've backwashed a few times already without replacing earth. So, I know it needs some.

    Quote Originally Posted by cowboycasey View Post
    you are doing great...

    DE filter: It will filter the best out of all filters, but you will need to clean it/backwash it the most out of all filters during a slam...
    you need to backwash/clean the filter when it raises 20 to 25% above normal, so after a thorough cleaning, write down your clean pressure and then you will know when 25% you backwash again...
    how you do a backwash or cleaning on a DE filter I have no idea, hopefully someone will let you know..

    scratch that, found this video

    - - - Updated - - -

    Thanks. I'll get some DE and add.
    Year:2000; 29k gallon IG pebble tec chlorine pool with spa; Pump: Pentair WhisperFlo High Performance 2HP single speed WF-28; Filter:Pentair FNS Plus D.E. FNPS60; Vacuum: Heyward PoolVac XL; WaterTester: Taylor FAS-DPD and ColorQ Plus 7 photometer digital

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    Re: Newbie with high CYA - getting ready to pump water out

    Measured again:

    FC = 17 down from 20 earlier today; Used Taylor
    CC = 0 which is similar to earlier today; Used Taylor
    CYA = 48 down slightly from yesterday (test with Taylor showed similar result as ColorQ...it might have been a bit lower even)
    PH = 7.6 up from 7.4 on a re-filled pool with no chlorine
    CA = 75 which is up from 29 on a re-filled pool
    TA = 106 which is about the same as 103 reading yesterday

    I'll get it back to Slam level which right around 20 for this CYA, and I'm sort of expecting to have little loss of Chlorine overnight the way it seems to be going. The pool was pretty clear before I started.

    I read that as long as Chlorine is no higher than shock level and we can see the bottom of the pool clearly, swimming was a ok. The kids are asking. That sounds like a fine idea. I also purchased some D.E. to add through the skimmer. We have backwashed multiple times without adding D.E. back.

    Quote Originally Posted by skaggsjw View Post
    Thanks for the encouragement. I'm getting some earth today. We've backwashed a few times already without replacing earth. So, I know it needs some.



    - - - Updated - - -

    Thanks. I'll get some DE and add.
    Year:2000; 29k gallon IG pebble tec chlorine pool with spa; Pump: Pentair WhisperFlo High Performance 2HP single speed WF-28; Filter:Pentair FNS Plus D.E. FNPS60; Vacuum: Heyward PoolVac XL; WaterTester: Taylor FAS-DPD and ColorQ Plus 7 photometer digital

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    Mod Squad kimkats's Avatar
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    Re: Newbie with high CYA - getting ready to pump water out

    Above all else SAFETY when swimming please. Can you see a child on the bottom of the pool?

    So long as the FC is just below SLAM level AND you can see the bottom it is safe to swim!

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: Newbie with high CYA - getting ready to pump water out

    The pool is clear as a bell this morning. I passed all three tests for completion of SLAM. FCL dropped less than 1 ppm overnight, CC is >0.5 and the water is clear.

    Thanks for all the advice and support. Looking forward to keeping a TFP.



    Quote Originally Posted by kimkats View Post
    Above all else SAFETY when swimming please. Can you see a child on the bottom of the pool?

    So long as the FC is just below SLAM level AND you can see the bottom it is safe to swim!

    Kim
    Attached Images Attached Images
    Year:2000; 29k gallon IG pebble tec chlorine pool with spa; Pump: Pentair WhisperFlo High Performance 2HP single speed WF-28; Filter:Pentair FNS Plus D.E. FNPS60; Vacuum: Heyward PoolVac XL; WaterTester: Taylor FAS-DPD and ColorQ Plus 7 photometer digital

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