Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: Are these readings ok?

  1. Back To Top    #1

    Join Date
    Jul 2014
    Location
    Berks County, PA
    Posts
    206

    Are these readings ok?

    Hi,

    I seem to have made it through the first winter after replastering without getting any scale, so I guess pulling back the cover and making periodical adjustments to pH and TA during the off-season helped. I want to know if these readings look alright...

    pH 7.6
    TA 110
    CH 170
    SI (at a current water temp of 74) -0.04

    I know CH should probably be higher but if I plug in a CH of 250, for example, and the water temp gets up into the mid 80s, the SI goes to 0.25...closer to the scaling zone. Let me know if anything should be adjusted.

    Thanks!

    Keith
    12,000 gal. Anthony IG pool; 3 ft. shallow end to 6 ft. deep end; Built 1989; Renovated July 2014 using a 10-part unexposed quartz plaster aggregate of 3 S-grade Blue, 3 S-grade Gray, 2 T-grade Blue, 2 T-grade Gray; Apollo VA-52 DE Filter; Hayward SP-2607X10 Super Pump 1-HP Single Speed; Jandy AE-Ti Heat Pump; Taylor K-2006 Test Kit

  2. Back To Top    #2

    Join Date
    Aug 2014
    Location
    Seminole, FL
    Posts
    92

    Re: Are these readings ok?

    You sure on that? One if us is using PoolMath wrong - if I plug in your numbers at 85 deg, I only get 0.16 for CSI. Unless your pH is stable you could try dropping TA to around 80 and pH to 7.5 when the water warms up. Check to see if pH stays relatively stable, then you can up CH to 250 with some wiggle room on CSI.

    Mike
    Built 1980, 19' x 30' almost rectangular, screened 15,000 gal, plaster, Hayward DE 3620 filter (currently using cellulose), Emerson 1081 1HP pump, AquaCal Heatwave SuperQuiet SQ110R heater, Zodiac T5 Cleaner, Taylor K-2006 test kit

  3. Back To Top    #3

    In the Industry

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

    Re: Are these readings ok?

    With those numbers you have little chance of scale. If you want to improve the CH (not a bad idea), simply drop your pH and TA down a bit.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  4. Back To Top    #4

    Join Date
    Jul 2014
    Location
    Berks County, PA
    Posts
    206

    Re: Are these readings ok?

    Mikech,


    I don't use the pool math calculator. I use the one on the pentairpool website. I just find that one easier to use. Your measurement and mine is close enough for me. Thanks.

    Duraleigh....thanks. I'll probably boost up the CH a bit. I don't get, though, how dropping the pH and TA raises the CH? Isn't it better to just add some CH increaser?
    12,000 gal. Anthony IG pool; 3 ft. shallow end to 6 ft. deep end; Built 1989; Renovated July 2014 using a 10-part unexposed quartz plaster aggregate of 3 S-grade Blue, 3 S-grade Gray, 2 T-grade Blue, 2 T-grade Gray; Apollo VA-52 DE Filter; Hayward SP-2607X10 Super Pump 1-HP Single Speed; Jandy AE-Ti Heat Pump; Taylor K-2006 Test Kit

  5. Back To Top    #5

    Join Date
    Aug 2014
    Location
    Seminole, FL
    Posts
    92

    Re: Are these readings ok?

    As per my post, dropping TA and pH gives you more potential to add CH for the same CSI
    Built 1980, 19' x 30' almost rectangular, screened 15,000 gal, plaster, Hayward DE 3620 filter (currently using cellulose), Emerson 1081 1HP pump, AquaCal Heatwave SuperQuiet SQ110R heater, Zodiac T5 Cleaner, Taylor K-2006 test kit

  6. Back To Top    #6

    Join Date
    Jul 2014
    Location
    Berks County, PA
    Posts
    206

    Re: Are these readings ok?

    OK...I see what you mean. I'm not that worried about CSI unless it gets close to either a scaling or etching range.
    12,000 gal. Anthony IG pool; 3 ft. shallow end to 6 ft. deep end; Built 1989; Renovated July 2014 using a 10-part unexposed quartz plaster aggregate of 3 S-grade Blue, 3 S-grade Gray, 2 T-grade Blue, 2 T-grade Gray; Apollo VA-52 DE Filter; Hayward SP-2607X10 Super Pump 1-HP Single Speed; Jandy AE-Ti Heat Pump; Taylor K-2006 Test Kit

Posting Permissions

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