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Thread: Getting the balance back after RO

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    Getting the balance back after RO

    Some insight please.

    So the numbers before RO were:
    FC 7
    CC 0
    PH 7.5
    TA 80
    Cal 980
    CYA 120
    TDS 3507
    SWCG 2320

    After the RO:
    FC 0
    CC 0
    PH 7.12
    TA 50
    Cal 140
    CYA 10
    TDS 485
    SWCG 333

    So I added some soda ash and 2 gallons of conditioner from the calucation from the pool math. My new readings on CAL with the test kit is 425 and the TA 80 and the CYA is below 30.

    I don't want to screw up the water after the RO.

    Current number as of today.

    Temp 60F
    FC 10.5
    CC .5
    TC 11
    PH 7.0-7.2
    TA 80
    Cal 425
    CYA below 30, maybe 28

    Thank you for the help. By the way I am using the POOLMATH.
    27K Gal, IG Plaster, Hayward EcoStar Variable Pump, Pentair DE FNS Plus Filter 24, Hayward AquaRite with extended life T-CELL-15
    The Pool Cleaner Sweep
    Build in 1969
    Water From City
    TF-100 Test Kit

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    JoyfulNoise's Avatar
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    Re: Getting the balance back after RO

    Right now your CSI is -0.40 and that's a little too low. You need to let your pH come up, 7.6 would be perfect. You can either raise it by aeration if you have a good source of aeration (like a spa spillway or waterfall) or you can use 20 Mule Team borax to raise it. While it is probably not important right away, you need to get your CYA up to probably 40ppm. Other than that, let your FC drift down to the appropriate levels found in the FC/CYA Charts and you should be good.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: Getting the balance back after RO

    Quote Originally Posted by JoyfulNoise View Post
    Right now your CSI is -0.40 and that's a little too low. You need to let your pH come up, 7.6 would be perfect. You can either raise it by aeration if you have a good source of aeration (like a spa spillway or waterfall) or you can use 20 Mule Team borax to raise it. While it is probably not important right away, you need to get your CYA up to probably 40ppm. Other than that, let your FC drift down to the appropriate levels found in the FC/CYA Charts and you should be good.
    do I add more conditioner?
    27K Gal, IG Plaster, Hayward EcoStar Variable Pump, Pentair DE FNS Plus Filter 24, Hayward AquaRite with extended life T-CELL-15
    The Pool Cleaner Sweep
    Build in 1969
    Water From City
    TF-100 Test Kit

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    JoyfulNoise's Avatar
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    Re: Getting the balance back after RO

    Did you use liquid conditioner (CYA) or granular powdered CYA? I prefer powder as it is cheaper and more concentrated than the liquid stuff.

    You can add more granular CYA to raise it. Use the sock method as outline in pool school and determine the amount you need from PoolMath.


    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: Getting the balance back after RO

    Hold on a second.....How did your CH go from 140 to 425? You did not add any calcium, correct?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Getting the balance back after RO

    Sorry for to horn in......new to pool lingo.....what does RO stand for...
    It took me days to figure out PB was pool Builder not pool Boy. Picture me asking myself why the pool BOY did so much construction......
    Bob (AKA Schnozz)
    12 x 24 x 52 Intex Ultra Frame AGP, 8600 Gal; Pentair 2HP/2SP 150sqft Cartridge Filter; Hayward Through Wall Skimmer; Intex Automatic Cleaner (Fantastic); K-2006 Test Kit; Start-up 07/30/2015. First Time Pool Owner in SoCal.

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    Re: Getting the balance back after RO

    Reverse Osmosis (hiring a company with a truck or cart mounted filter system to remove unwanted things from water usually calcium or CYA)
    12,300 Gallon, IG PebbleFina, 3 ft sheer, 2 Jandy nicheless LED lights, Jandy Pro 1.5HP VS pump (A.O. Smith Motor), PB4-60 Booster pump, Polaris 280, Jandy cv340 cartridge filter, Zodiac Z4 control panel W/iAquaLink, Stenner pumps for chlorine & MA connected to WiOn WiFi switches, TF-100. You can support TFP with AmazonSmile just click the link!

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    Re: Getting the balance back after RO

    Quote Originally Posted by duraleigh View Post
    Hold on a second.....How did your CH go from 140 to 425? You did not add any calcium, correct?
    140 was his digital reading and mine was with the test kit.

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    Re: Getting the balance back after RO

    140 was his digital reading and mine was with the test kit.
    That's quite confusing on more than one level.
    Temp 60F
    FC 10.5
    CC .5
    TC 11
    PH 7.0-7.2
    TA 80
    Cal 425
    CYA below 30, maybe 28
    Can we assume those are test results from your (K-2006 or TF-100) testing?

    What does your water look like?

    Have you read "The ABC's of Pool Water Chemistry" up in Pool School?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Getting the balance back after RO

    Quote Originally Posted by Imracerx View Post
    140 was his digital reading and mine was with the test kit.
    I'd go with the test kit result
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
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