Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 9 of 9

Thread: Chemistry out of control. Must drain and refill

  1. Back To Top    #1

    Chemistry out of control. Must drain and refill

    It looks like my pool will have to be drained, refilled and re balanced. This time I want to do it myself and use the BBB method! Heres the situation:

    1. FC over 5.. maybe 10
    2. CC off the scale as well
    3. PH 7.4 to 7.5. I tested 3 times
    4. total alc 150
    5. calcium 290 to 300
    CYA over 200. I tested three times. Also diluted sample 50/50 with distilled water and multiplied x 2. Test results consistent

    Pool has an unpleasant smell. It is normally covered, but is now open and in direct sun.

    The water I want to refill with has a PH of 7.5. total alc of 40 FCL 0 calcium 40

    The pool is plaster, 1 year old

    The pool calculator says drain up to 80% and refill, so I might as well drain it completely

    1. Will the cured plaster be at risk when I drain it? It will take about 30 hours to refill with my water source.

    2. What should the sequence of chemicals be? I will have large quantities of BBB on hand as well as Acid, seqestrant and CYA

    The pool is cured, but essentially new. I'd hate to ruin it!

    Thanks for the help. Maybe I'm just over thinking the process!
    Frank, Northern Ca. 45,000 gallon 1 year old 20 x 50 inground, white plaster, Aqua Matic automatic cover, 525 sq foot cartridge filter, 1.5 hp variable speed Hayward Pump, Nature in line chlorinator, Polaris Pool Sweep with 3/4 hp aux. pump. 400,000 BTU Sta Rite propane heater. All equpment located below actual pool surface elevation

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: Chemistry out of control. Must drain and refill

    What city and state (climate) do you live in?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    TFP Guide

    chiefwej's Avatar
    Join Date
    Jun 2011
    Location
    Tucson
    Posts
    2,853

    Re: Chemistry out of control. Must drain and refill

    His sig says Northern CA.
    chiefwej
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

  4. Back To Top    #4

    Re: Chemistry out of control. Must drain and refill

    Hi again. I'm just outside Grass Valley at 1800 ft. Full sun on pool. Very hot summer days.
    Frank, Northern Ca. 45,000 gallon 1 year old 20 x 50 inground, white plaster, Aqua Matic automatic cover, 525 sq foot cartridge filter, 1.5 hp variable speed Hayward Pump, Nature in line chlorinator, Polaris Pool Sweep with 3/4 hp aux. pump. 400,000 BTU Sta Rite propane heater. All equpment located below actual pool surface elevation

  5. Back To Top    #5

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: Chemistry out of control. Must drain and refill

    . Will the cured plaster be at risk when I drain it? It will take about 30 hours to refill with my water source.
    In that seemingly dry climate, I think you would do better not completely draining the pool but rather replace the water in increments.

    I would suggest you drain 1/3, refill, then drain 1/3 more, refill, etc. until you have reached a goal of about 50 ppm CYA. Then, you can start the shock process.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  6. Back To Top    #6

    Re: Chemistry out of control. Must drain and refill

    Thanks Dave. That's seems like a safer alternative than draining the whole pool and having it bone dry. My water is free except for the cost of electricity to pump it about 100 vertical feet, a small price to pay compared to city water.

    I'll post the results of the process.

    F.
    Frank, Northern Ca. 45,000 gallon 1 year old 20 x 50 inground, white plaster, Aqua Matic automatic cover, 525 sq foot cartridge filter, 1.5 hp variable speed Hayward Pump, Nature in line chlorinator, Polaris Pool Sweep with 3/4 hp aux. pump. 400,000 BTU Sta Rite propane heater. All equpment located below actual pool surface elevation

  7. Back To Top    #7
    Casey's Avatar
    Join Date
    Apr 2007
    Location
    SW PA
    Posts
    10,157

    Re: Chemistry out of control. Must drain and refill

    Any progress? Please post an update. Thank you.
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

  8. Back To Top    #8

    Re: Chemistry out of control. Must drain and refill

    Hi Casey. I should have an update by the end of this weekend. Too many kids came over yesterday and wanted to swim... and the pool actually looked pretty good. The water quality looks better the cover left open 24/7. I also retested CyN and the levels were not 200. The tests consistently indicated 110+. CL is 3-5, PH 7.8. So, I'll drain 1/3 tonight and start the balancing process. The incoming water is soft ( ca about 40 but the ph is 40, total alc also about 40). Since this is my first time managing all the variables, it should be interesting. Frank F.
    Frank, Northern Ca. 45,000 gallon 1 year old 20 x 50 inground, white plaster, Aqua Matic automatic cover, 525 sq foot cartridge filter, 1.5 hp variable speed Hayward Pump, Nature in line chlorinator, Polaris Pool Sweep with 3/4 hp aux. pump. 400,000 BTU Sta Rite propane heater. All equpment located below actual pool surface elevation

  9. Back To Top    #9

    Re: Chemistry out of control. Must drain and refill

    Small error. The ph of the new water is 7.4, not 40. F.
    Frank, Northern Ca. 45,000 gallon 1 year old 20 x 50 inground, white plaster, Aqua Matic automatic cover, 525 sq foot cartridge filter, 1.5 hp variable speed Hayward Pump, Nature in line chlorinator, Polaris Pool Sweep with 3/4 hp aux. pump. 400,000 BTU Sta Rite propane heater. All equpment located below actual pool surface elevation

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •