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Thread: what problems come from low Total Alkalinity? Any?

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    20GT's Avatar
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    what problems come from low Total Alkalinity? Any?

    I posted this question because i could not find a answer on the Board

    I've been told by TFP not to worry about low Total Alkalinity
    On the WWW it says otherwise can some set me straight on this?


    this is what i found :

    PROBLEMS RESULTING FROM LOW ALKALINITY: If the Alkalinity of your pool is too low, these problems will occur:

    * Dissolved metallic parts of your pool (walls, floor, hand rails, ladders, light fixtures, and equipment). This could even lead to discolored water or stains on the pool walls and floor.
    * Stained and etched concrete in concrete pools.
    * Stained and etched plaster in gunite or shotcrete pools.
    * Stained liner in vinyl-liner pools.
    * Blistering or delamination of fiberglass in fiberglass pools.
    * "pH Bounce." Alkalinity acts as a buffer for pH. If the Alkalinity is low, the pH will fluctuate dramatically. Yesterday, it may have been 7.0, and today it may be 7.8, and tomorrow it may be 6.8-it can change from one extreme to the next, literally overnight.
    * Minimizes the effectiveness of chlorine (or its alternative).
    * Eye and skin irritation.

    Thanks
    Pasted from <http://www.poolmanual.com/manual/alkalinity.html>
    5,593 gallons of water at 80% capacity <Orlando, Florida>
    AG Intex Round Metal pole Swimming Pool - 16 Feet x 48 Inches (Intex A 16 X 48 F B02 11 01)
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    Mod Squad JohnT's Avatar
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    Re: what problems come from low Total Alkalinity? Any?

    Quote Originally Posted by 20GT
    I posted this question because i could not find a answer on the Board

    I've been told by TFP not to worry about low Total Alkalinity
    On the WWW it says otherwise can some set me straight on this?
    Nobody here told you not to worry about low TA. It can cause pH instability.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
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    Butterfly's Avatar
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    Re: what problems come from low Total Alkalinity? Any?

    If we did say not to worry about your TA, then your #'s were within acceptable range.

    Did you see Recommended Levels in Pool School?
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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    20GT's Avatar
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    Re: what problems come from low Total Alkalinity? Any?

    Hmmm please review my post (Link) on the second page i ask "do i need to care about phosphates, calcium hardness, total alkalinity."
    http://www.troublefreepool.com/test-...t35565-20.html
    5,593 gallons of water at 80% capacity <Orlando, Florida>
    AG Intex Round Metal pole Swimming Pool - 16 Feet x 48 Inches (Intex A 16 X 48 F B02 11 01)
    Sand, SandPro 75 – 3/4 HP, 45GPM/2700GPH flow rate. GAM-4511 (Just days old 7/5/11)
    Crystal Clear Still

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    20GT's Avatar
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    Re: what problems come from low Total Alkalinity? Any?

    Ah found it thanks
    vinyl with Bleach

    FC 3-7
    pH 7.5-7.8
    TA 70-90+
    CH 50-300
    CYA 30-50
    5,593 gallons of water at 80% capacity <Orlando, Florida>
    AG Intex Round Metal pole Swimming Pool - 16 Feet x 48 Inches (Intex A 16 X 48 F B02 11 01)
    Sand, SandPro 75 – 3/4 HP, 45GPM/2700GPH flow rate. GAM-4511 (Just days old 7/5/11)
    Crystal Clear Still

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    JasonLion's Avatar
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    Re: what problems come from low Total Alkalinity? Any?

    Right, your TA is just a little high, nothing to worry about since you don't have a SWG.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    20GT's Avatar
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    Re: what problems come from low Total Alkalinity? Any?

    pinch a penny wants you to keep it between 120-140 lol
    5,593 gallons of water at 80% capacity <Orlando, Florida>
    AG Intex Round Metal pole Swimming Pool - 16 Feet x 48 Inches (Intex A 16 X 48 F B02 11 01)
    Sand, SandPro 75 – 3/4 HP, 45GPM/2700GPH flow rate. GAM-4511 (Just days old 7/5/11)
    Crystal Clear Still

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    Butterfly's Avatar
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    Re: what problems come from low Total Alkalinity? Any?

    Quote Originally Posted by 20GT
    Ah found it thanks
    vinyl with Bleach

    FC 3-7
    pH 7.5-7.8
    TA 70-90+
    CH 50-300
    CYA 30-50
    And here are/were your #'s:
    FC = 10 ,TC = 10 ,pH = 7.4 ,TA = 110 ,CH = 160 ,CYA = 50 (7-10-11)
    So your TA is okay, a touch high (definitely not low) and if the pH remains stable it is fine where it is, your CH is just fine, and phosphates in a properly chlorinated pool don't matter. ie, JasonLion's pool is over 4,000 (I think that's close to correct) & he has no problems.

    We/I saw where the pool store tried to pool store your wife (in that link) and we just tried to clear it up for you.

    It is not a good idea to put your test numbers in your sig. The sig is for mostly permanent information.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Butterfly's Avatar
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    Re: what problems come from low Total Alkalinity? Any?

    Quote Originally Posted by 20GT
    pinch a penny wants you to keep it between 120-140 lol
    Well, if you were using trichlor tablets you would want your TA to be higher, around 100 to 120.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    20GT's Avatar
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    Re: what problems come from low Total Alkalinity? Any?

    thanks
    and we are using those
    (just updated sig will remove it after a while) 7-12-11
    5,593 gallons of water at 80% capacity <Orlando, Florida>
    AG Intex Round Metal pole Swimming Pool - 16 Feet x 48 Inches (Intex A 16 X 48 F B02 11 01)
    Sand, SandPro 75 – 3/4 HP, 45GPM/2700GPH flow rate. GAM-4511 (Just days old 7/5/11)
    Crystal Clear Still

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    Re: what problems come from low Total Alkalinity? Any?

    That "don't worry" was in response to your post immediately above that reported TA 100 and CH 160. Both in range for vinyl.

    If you mean to ask if you should EVER worry about them, read Pool School.
    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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    Re: what problems come from low Total Alkalinity? Any?

    I would be more concerned at this point with the CYA at 100 and using pucks as you are still increasing it.

    pool-school/chlorine_cya_chart_shock
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    Re: what problems come from low Total Alkalinity? Any?

    Quote Originally Posted by GK
    I would be more concerned at this point with the CYA at 100 and using pucks as you are still increasing it.

    pool-school/chlorine_cya_chart_shock
    Yes, and here is the cross reference link: post293340.html#p293340
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: what problems come from low Total Alkalinity? Any?

    San Juan Pools (fiberglass) says to keep TA between 125 and 150. Is that true for all fiberglass pools? Why that high?
    12,500 Gallon fiberglass, chlorine,1 skimmer, 2 returns adjustable eyes, sand filter, automatic chlorinator (don't use except for vacation or if CYA gets low), 1-1/2 hp EcoTech motor on Pentaire Supeflo pump some trees.

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    Mod Squad pooldv's Avatar
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    Re: what problems come from low Total Alkalinity? Any?

    No, here are the recommended levels for a fiberglass pool, Pool School - Recommended Levels

    Please start your own thread with new questions rather than asking your question in another thread.
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