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Thread: New pool owner

  1. Back To Top    #1

    Join Date
    Aug 2013
    Location
    El Paso, TX
    Posts
    14

    New pool owner

    Never owned a pool before but over the last month I have learned that the supposed experts at the pool store do not know any more than me. The previous owner used trichlor tablets and calcium hypo for shock. I am using liquid chlorine.

    Test results

    FC 5
    CC. 0.5
    PH- 7.7
    TA. 170
    CH. 460
    CYA. 120

    I am losing 3ppm chlorine daily and have significant white scale around the edge of the pool.

    Here is my plan. Please correct me if I am screwing something up.

    Drain 10k gallons then refill two times which should be about 60% water change. Hopefully this will get my CYA and CH back in order and make everything else easier. When I drain the water, will scrubbing with muriatic take off the white scale?

    After the water change, I will test again to see what my TA is the start lowering that with the muriatic/aerate technique. Hopefully that will reduce my chlorine input.

    Re. The Liquidator- From reading all of the posts about installation, I picked up that I would not need the check-valves with a below ground pool. With my pool, without the valves installed, the Liquidator allowed a bunch of air into the system when the pump shut off. After I put them in, problem solved. Question. When adjusting the flow rate, are we supposed to look at the ball in the meter, or the water level in the meter? I thought the ball would be floating in top but it isn't.
    30000 Gallon Gunite Pool
    StaRite system 3 cartridge filter MDL S8M150 450 sq ft
    1hp Max E Flo pump MDL P6RA6E-205L
    8 Gallon Liquidator w/ 3/8 inch Upgrade

  2. Back To Top    #2
    linen's Avatar
    Join Date
    Jul 2010
    Location
    Twin Cities, MN
    Posts
    8,649

    Re: New pool owner

    Welcome to tfp, Rwagen
    Quote Originally Posted by Rwagen
    Drain 10k gallons then refill two times which should be about 60% water change. Hopefully this will get my CYA and CH back in order and make everything else easier. When I drain the water, will scrubbing with muriatic take off the white scale?
    This should get you to ~53 ppm cya which is good.

    Quote Originally Posted by Rwagen
    After the water change, I will test again to see what my TA is the start lowering that with the muriatic/aerate technique. Hopefully that will reduce my chlorine input.
    TA does not affect chlorine usage. It does however effect the potential for scaling. Keeping ph down around 7.2 should help with that though.

    I don't have experience with the liquidator so someone else will have to answer that question.
    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.

  3. Back To Top    #3

    Join Date
    Aug 2013
    Location
    El Paso, TX
    Posts
    14

    Re: New pool owner

    Thank you. Reducing the CYA was what I was hoping would lower my chlorine usage. I just put that comment in the wrong section.
    30000 Gallon Gunite Pool
    StaRite system 3 cartridge filter MDL S8M150 450 sq ft
    1hp Max E Flo pump MDL P6RA6E-205L
    8 Gallon Liquidator w/ 3/8 inch Upgrade

  4. Back To Top    #4
    linen's Avatar
    Join Date
    Jul 2010
    Location
    Twin Cities, MN
    Posts
    8,649

    Re: New pool owner

    Quote Originally Posted by Rwagen
    Thank you. Reducing the CYA was what I was hoping would lower my chlorine usage. I just put that comment in the wrong section.
    Well this is a little off as well. If you pool is algae free, then a higher cya level will typically reduce your chlorine consumption. The tfp recommendation of 30-50 ppm cya (we lean more towards 50 ppm cya) is to balance sun protection with reasonable maintenance FC levels and SLAM levels. You will use less FC if you go a bit higher in cya level, but you will also have to maintain a higher minimum FC level...and if you need to SLAM, then you will have to use much higher FC levels.

    I would guess that you do have a low level algae growth that is using up some of your chlorine right now since at 120 ppm the sun won't use much (probably around 10%-15%). Another good reason to lower the cya, since it is likely you will need the SLAM process.
    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.

  5. Back To Top    #5

    Join Date
    Aug 2013
    Location
    El Paso, TX
    Posts
    14

    Re: New pool owner

    I had not realized that about my chlorine usage but that informations matches what I think I determined last night. I took chlorine measurements after dark and lost about 2ppm throughout the night. According to the pool school, that indicates that something is growing even if my water is clear. I might be keeping just ahead of it.

    Now I just need to figure out when I am allowed to fill a pool in El Paso so I can do my first drain then slam the pool.

    I appreciate your assistance.

    Rick
    30000 Gallon Gunite Pool
    StaRite system 3 cartridge filter MDL S8M150 450 sq ft
    1hp Max E Flo pump MDL P6RA6E-205L
    8 Gallon Liquidator w/ 3/8 inch Upgrade

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