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Thread: Chemical numbers - request advice

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    sonflower's Avatar
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    Chemical numbers - request advice

    FC: 1.5
    CC: 0
    TC: 1.5

    pH: 8.0 (acid demand test was 6 drops)
    TA: 220
    CH: 180
    CYA: 55
    Salt: 2900

    Thanks in advance
    Pool: (2003) IG Plaster 14,209 gallon (Water Surface 421 sq. ft.) ~ Spa: 18" raised kidney
    Triple spillway (Waterfall) ~ With 6' slide ~ Hayward's Goldline Controls Aqua Rite Digital Electronic Chlorine Generator (Salt System) ~ 40K Salt Cell ~
    ~ AquaLink RS -4 ~ Purex Whisper Flow 2 HP~ Aquatech 60 sq. ft. DE Filter Normal Pressure 22 # ~ MiniMax NT (Propane) Heater 400,000 BTU ~ Jandy Valve Actuator ~Letro Legend Cleaner ~ K-2006 & K-1766 Test Kits

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    Re: Chemical numbers - request advice

    1. Lower your pH to 7.2-7.4....the SWG is probably making it slowly rise, lower it when it gets to 7.8.

    2. Your FC is a little low - 3-4ppm would be better

    3. There a couple of other tweaks, too, but tell us how your water looks?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    sonflower's Avatar
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    Re: Chemical numbers - request advice

    Quote Originally Posted by duraleigh
    3. There a couple of other tweaks, too, but tell us how your water looks?
    Thank you!

    Crystal clear, sparkly.
    Pool: (2003) IG Plaster 14,209 gallon (Water Surface 421 sq. ft.) ~ Spa: 18" raised kidney
    Triple spillway (Waterfall) ~ With 6' slide ~ Hayward's Goldline Controls Aqua Rite Digital Electronic Chlorine Generator (Salt System) ~ 40K Salt Cell ~
    ~ AquaLink RS -4 ~ Purex Whisper Flow 2 HP~ Aquatech 60 sq. ft. DE Filter Normal Pressure 22 # ~ MiniMax NT (Propane) Heater 400,000 BTU ~ Jandy Valve Actuator ~Letro Legend Cleaner ~ K-2006 & K-1766 Test Kits

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    Re: Chemical numbers - request advice

    Crystal clear, sparkly.
    That's great!!

    Okay, so (very soon) your pool will be pH around 7.2-7.4 or so and you're gonna' keep your FC about 3-4

    I would then suggest you bring the CYA up just a little bit. Most SWG's like 60-80ppm so you could target 70 (up 15 from your current 55) It's pretty hard to test that accurately so just calculate the dosage and assume it's there.

    Then your CH could come up just a little as well. Most masonry pools should be between 200-400 or so so if you raised yours by 50-100ppm that would be just about right.

    Once all those changes get settled in, we'll work on bringing the TA down. That's a process rather than a chemical addition. You can read how to do it in Pool School but I wouldn't mess with it until all your other adjustments have been made.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    sonflower's Avatar
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    Re: Chemical numbers - request advice

    Pool Calculator recommends 40 oz of MA and 28 oz of stabilizer. Do I do both at same time?
    Pool: (2003) IG Plaster 14,209 gallon (Water Surface 421 sq. ft.) ~ Spa: 18" raised kidney
    Triple spillway (Waterfall) ~ With 6' slide ~ Hayward's Goldline Controls Aqua Rite Digital Electronic Chlorine Generator (Salt System) ~ 40K Salt Cell ~
    ~ AquaLink RS -4 ~ Purex Whisper Flow 2 HP~ Aquatech 60 sq. ft. DE Filter Normal Pressure 22 # ~ MiniMax NT (Propane) Heater 400,000 BTU ~ Jandy Valve Actuator ~Letro Legend Cleaner ~ K-2006 & K-1766 Test Kits

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    Re: Chemical numbers - request advice

    Sure, same time is fine.

    Don't backwash for a week if you put stabilizer in the skimmer....it dissolves in the filter and takes a long time. You can get around that if you like by tieing it up in an old sock and dropping the sock in one of the skimmers.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    sonflower's Avatar
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    Re: Chemical numbers - request advice

    I'm almost embarassed to ask this question but since I've had conflicting advice here goes. I have been told twice that it's ok to put the stabilizer in panty hose in front of a jet. I have read here to put stabilizer in sock in skimmer. Not all socks are created equal...I mean there's thick heavy athletic socks and really thin fashion socks...so:

    1) is it ok to put stabilizer in panty hose in front of return jet? Does it help or hinder the process?

    2) should I use athletic socks when putting stabilizer in the skimmer? because I have so many of those...that is what comes to mind when I picture putting stabilizer in a sock in the skimmer.

    Or perhaps I'm way off and there is a special sock purchased at the PSS for such a purpose...

    Thanks again.
    Pool: (2003) IG Plaster 14,209 gallon (Water Surface 421 sq. ft.) ~ Spa: 18" raised kidney
    Triple spillway (Waterfall) ~ With 6' slide ~ Hayward's Goldline Controls Aqua Rite Digital Electronic Chlorine Generator (Salt System) ~ 40K Salt Cell ~
    ~ AquaLink RS -4 ~ Purex Whisper Flow 2 HP~ Aquatech 60 sq. ft. DE Filter Normal Pressure 22 # ~ MiniMax NT (Propane) Heater 400,000 BTU ~ Jandy Valve Actuator ~Letro Legend Cleaner ~ K-2006 & K-1766 Test Kits

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    Mod Squad Bama Rambler's Avatar
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    Re: Chemical numbers - request advice

    Pantyhose or socks work fine either place. We recommend doing it in front of a return if there is a slight possibility that you may have to backwash because if you put it in the skimmer it goes straight to the filter where it gets trapped and if you backwash it will get carried out with the water.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Chemical numbers - request advice

    What you don't want is a sock so coarse that the stuff falls though it. Fine knit sock or pantyhose is better.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

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