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Thread: Advice on draining Pool

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    Advice on draining Pool

    With a lot of the feedback and help that I have gotten from this forum I have decided to drain my pool and start with a fresh canvas.

    The main reason is that (before I found TFP) I had been getting tests at Leslie's. CYA was always in the 100+ range, with one anomaly at 50 (probably a bad test). After getting my k-2006 and running a couple of CYA tests, I see that it is WELL above the 100 mark.

    Before bothering you I have scanned some of the others' questions and answers. I noticed that all of them say a picture is worth 1000 words so I will add pics with the information.

    The pool is located in San Antonio, TX. Direct sun - staying around 90* for the month that I have been in the house.

    13x23x5=9800 gallons if I run it as an oval - is that correct for my shape pool?

    Questions:

    My pool is partially in-ground - on a slight hill. See pics. We have had little rainfall and San Antonio has a low water table. are there any issues I should check for during the drain or possibly avoid? mos of the lawn watering will be done in the front of the house because I don't want to saturate ground near the pool or to where the run-off could get to the ground surrounding the empty pool (my thoughts)

    Should I just drain from the main floor drain or rent a pump - I will be watering the lawn with it because it is thirsty in this climate. I know that it will take longer, but I will be able to handle the watering with the main pool pump.

    If draining from the main pump and shutting down the skimmer with the valve should I be concerned with anything? There should be no water coming back through the return jets if I divert it to the hose I assume.

    Algae on walls - I plan on brushing it to the drain as I empty the water. I have read not to bother with major bleaching or wipedown before refill. Should I try to Kill the algae with any particular method or just brush it as the pool drains.

    Watering lawn - Chlorine is minimal ( thus the problem) is there anything else I should be worried about that could damage the lawn?

    Water Softener - I have a whole house softener. The hose bibs are coming through the foundation. I am not sure if they are piped in to the softener or not. Is there a way to confirm this before I move forward. Someone said that the outside spigots should not be looped to the softener, but I want to confirm that. All of the softeners that I have put in have had extra unsoftened water spigots that were piped.

    Will upload pictures shortly.
    Matt in San Antonio
    10,000 gallon IG plaster
    Pentair Intelliflow 2VS 3hp 3/4 hp booster pump
    Hayward C-1100 Cartridge Filter
    Sunluway 18w Color changing led light

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    Re: Advice on draining Pool



    Pump set up


    Matt in San Antonio
    10,000 gallon IG plaster
    Pentair Intelliflow 2VS 3hp 3/4 hp booster pump
    Hayward C-1100 Cartridge Filter
    Sunluway 18w Color changing led light

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    Re: Advice on draining Pool



    Pool condition with algae


    Matt in San Antonio
    10,000 gallon IG plaster
    Pentair Intelliflow 2VS 3hp 3/4 hp booster pump
    Hayward C-1100 Cartridge Filter
    Sunluway 18w Color changing led light

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    Re: Advice on draining Pool





    Pool


    Matt in San Antonio
    10,000 gallon IG plaster
    Pentair Intelliflow 2VS 3hp 3/4 hp booster pump
    Hayward C-1100 Cartridge Filter
    Sunluway 18w Color changing led light

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    Re: Advice on draining Pool

    Hello! Before draining your pool I would get an exact cya reading. Try diluting 1/2 pool water with 1/2 tap water. Perform the CYA test and multiply the result by 2. Also it would be nice to know a full set of results: pH, FC, diluted CYA, TA and CH. If you CYA is really 100 then I would recommend a partial drain/refill, say 50%. Afterwards I would SLAM that sucker...that pool looks pretty good and the slam should not be too bad.

    You can also perform a CA test on water from the spigot and from the inside faucet that will tell you about your CA levels.
    39YO 13K gallon former SWAMP/MONEY PIT, concrete bottom/Fiberglass Walls, Ecotech VS pump, Hayward Sand Filter, Dolphin DX5 Plus, Loop-Loc safety cover and YES, I have a TFT-100 test kit!

    Shock Level and Maintain - CL/CYA Chart

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    Re: Advice on draining Pool



    My pump. Will be researching


    Matt in San Antonio
    10,000 gallon IG plaster
    Pentair Intelliflow 2VS 3hp 3/4 hp booster pump
    Hayward C-1100 Cartridge Filter
    Sunluway 18w Color changing led light

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    Re: Advice on draining Pool

    With the diluted test I am at 100 CYA.


    Matt in San Antonio
    10,000 gallon IG plaster
    Pentair Intelliflow 2VS 3hp 3/4 hp booster pump
    Hayward C-1100 Cartridge Filter
    Sunluway 18w Color changing led light

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    Re: Advice on draining Pool

    FC 0
    Cc 1
    Ph >7
    Ch 580 plus. Not sure of this test will research
    CYA 200
    Temp 90


    Matt in San Antonio
    10,000 gallon IG plaster
    Pentair Intelliflow 2VS 3hp 3/4 hp booster pump
    Hayward C-1100 Cartridge Filter
    Sunluway 18w Color changing led light

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    duraleigh's Avatar
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    Re: Advice on draining Pool

    Hi, Matt,

    Certainly I would suggest you drain but perhaps not a complete drain. a 75% drain will get your CYA down to 50 (about perfect) and will save you some water and time.

    The point of my post, however, is I am reading between the lines and it seems you might be thinking it will help with the algae......it wont. Not even a 100% drain Will cure your pool of algae. YOu will need to SLAM the pool but don't worry about it until you start your refill.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Advice on draining Pool

    I understand Dura. Thanks. The drain is impending. I have just been advised to drain because with this high of a CYA I am thinking CYA might be higher than I logged. Here is another question. When the dot disappears on the CYA TEST as the water settles I can faintly see it again. If you should go off of when it first settles my CYA is higher.


    Matt in San Antonio
    10,000 gallon IG plaster
    Pentair Intelliflow 2VS 3hp 3/4 hp booster pump
    Hayward C-1100 Cartridge Filter
    Sunluway 18w Color changing led light

  11. Back To Top    #11

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    Re: Advice on draining Pool

    Yep, you are going to have to drain and refill...then it is possible, depending on how much above 200, you may have to do a smaller drain and refill again to get your CYA to a manageable level. 50 ppm is about where you want that CYA.

    Is that CA level from the pool, indoor faucet or outdoor spigot?
    39YO 13K gallon former SWAMP/MONEY PIT, concrete bottom/Fiberglass Walls, Ecotech VS pump, Hayward Sand Filter, Dolphin DX5 Plus, Loop-Loc safety cover and YES, I have a TFT-100 test kit!

    Shock Level and Maintain - CL/CYA Chart

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    Re: Advice on draining Pool

    CA level? The CYA was from the pool.


    Matt in San Antonio
    10,000 gallon IG plaster
    Pentair Intelliflow 2VS 3hp 3/4 hp booster pump
    Hayward C-1100 Cartridge Filter
    Sunluway 18w Color changing led light

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    Re: Advice on draining Pool

    Ca = calcium = CH...you had asked about your water softener and whether it was tied into the outside spigot. I was asking if that level was from the pool or the spigot.
    39YO 13K gallon former SWAMP/MONEY PIT, concrete bottom/Fiberglass Walls, Ecotech VS pump, Hayward Sand Filter, Dolphin DX5 Plus, Loop-Loc safety cover and YES, I have a TFT-100 test kit!

    Shock Level and Maintain - CL/CYA Chart

  14. Back To Top    #14

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    Re: Advice on draining Pool

    Sorry. Just learning. The Ca level from the CH was from the pool. I am color blind and have a difficult time on that test.

    Have not done one from the hose spigot. How would I determine if it is soft water or not? Levels?


    Matt in San Antonio
    10,000 gallon IG plaster
    Pentair Intelliflow 2VS 3hp 3/4 hp booster pump
    Hayward C-1100 Cartridge Filter
    Sunluway 18w Color changing led light

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    wjr75's Avatar
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    Re: Advice on draining Pool

    If you drain it have it power washed and diluted acid washed. Will look like new.
    Inground 22k gallon gunite 15x31 main pool, 15x7 wading pool/sunning deck, hot tub/with overflow (9' octagon with limestone top) & slide NSWG, Aqua Blue Pebble Sheen
    Filter dual cartridge Sta-rite 450sq/ft, TF-100 Test Kit
    Heater Raypak 2100 400k btu cupro-nickel exchanger
    Auto pool cover, Polaris 280 auto pool cleaner, Jandy AqualinkRS8 Remote Control System

  16. Back To Top    #16

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    Re: Advice on draining Pool

    Will have to do that next time. I'm on a time crunch.


    Matt in San Antonio
    10,000 gallon IG plaster
    Pentair Intelliflow 2VS 3hp 3/4 hp booster pump
    Hayward C-1100 Cartridge Filter
    Sunluway 18w Color changing led light

  17. Back To Top    #17

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    Re: Advice on draining Pool

    I'm betting you have hard water = higher CA levels...if you test the water from an outside spigot that will confirm how hard your water is currently. If it is high you will have to manage your CSI using a lower pH/lower TA. Right now the main thing to concern yourself with is getting that CYA down. We can worry about your calcium later.
    39YO 13K gallon former SWAMP/MONEY PIT, concrete bottom/Fiberglass Walls, Ecotech VS pump, Hayward Sand Filter, Dolphin DX5 Plus, Loop-Loc safety cover and YES, I have a TFT-100 test kit!

    Shock Level and Maintain - CL/CYA Chart

  18. Back To Top    #18

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    Re: Advice on draining Pool

    Agreed. That leads us back to my other questions posted.

    I assume my pool will not hop out of the ground.

    Lawn - OK

    Drain from the main drain.

    Brush algae but don't kill myself professionally cleaning walls.

    Water softener - deal with hardness later. Hopefully won't break my water softener by over using it.


    Matt in San Antonio
    10,000 gallon IG plaster
    Pentair Intelliflow 2VS 3hp 3/4 hp booster pump
    Hayward C-1100 Cartridge Filter
    Sunluway 18w Color changing led light

  19. Back To Top    #19

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    Re: Advice on draining Pool

    1. Lawn use is OK
    2. It can pop out, depending on your water table. Maybe somebody else can chime in on that one.
    3. You can drain from the main drain.
    4. Brush it good, brush it real good or you can pressure wash.
    39YO 13K gallon former SWAMP/MONEY PIT, concrete bottom/Fiberglass Walls, Ecotech VS pump, Hayward Sand Filter, Dolphin DX5 Plus, Loop-Loc safety cover and YES, I have a TFT-100 test kit!

    Shock Level and Maintain - CL/CYA Chart

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    Mark R's Avatar
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    Re: Advice on draining Pool

    Maybe it's just me, but, draining a pool in the summer with it being so hot with full sunlight might not be the best idea. I would probably wait until until November so you don't have to baby sit the plaster. Good luck
    12k gal Gunite/Hayward filter C5520BH with quad 33 inch filters. 2.5 hp motor. Pool is on south side, so full sun light. Spill over spa.
    Laar's heater LT250-Low NOx Gas Fired for pool/spa 250,000 BTU. Roof mount 6 panel solar system installed east/south. TF-100 test kit. May-September 100+ degrees out side.

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