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Thread: Some basic questions!

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    Join Date
    Jun 2015
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    Montreal, QC, Canada
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    Some basic questions!

    Hello everyone,

    I'm a new pool owner since last fall. I've read a lot, but I got a few basic questions.
    Disclaimer: I am experimenting using trichlo tabs this year and I am well aware of their downside, so please don't "SLAM" me about it

    1. So in general, how important is it to keep water at a certain level. So I started with water about half of skimmer height, but it's been raining a lot, so now i'm about 3/4 height. Is it important to bring it back down to mid skimmer level? It makes sense to me if water level goes down to replenish it, but if water goes up a bit, is there a downside?

    2. When is it accurate to re-test levels after adding something. eg. if I add pH minus, when can I retest pH and get an accurate read? 30 min after? 2 hours after? The next day?
    Iím sure it depends on what you are adding. How about liquid chlorine? Because I think I might use trichlor for a baseline chlorine and top off with liquid chlorine before a swim.

    I've got more questions but I'm going to stop here for now.

    Using Taylor K-2006. Here are latest stats.

    Water is clear.
    pH 7.6
    free cl 1.0
    Combined cl 0
    TA 110
    CH 230
    Cya 30


    Thank you
    Round Above ground Cedar pool 18ft (approximately 30,000L = 8000 gallons), Hayward 2 speed 1.5HP pump, Hayward XStream Cartridge filter, Hayward Titanium HP50B 55,000 BTU heat pump, Hayward offline chlorinator, Big dipper ozonator.

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    Richard320's Avatar
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    Re: Some basic questions!

    1) The skimmer works better if there's room for debris to float in. Also, if an above ground pool overflows the lip, you could get water behind the liner. Also the water will find the lowest point on the sidewall to spill over. That area will get waterlogged and soft and the low support will sink even lower. Better if you drain the water where you want it.
    2) Thirty minutes with the pump on should be plenty for adjustments to show up. If you brush all around the pool and get some cross currents, even less.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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    Re: Some basic questions!

    Richard thanks a lot for quick response.

    Here is another questions specifically about increasing TA, because I had to play with TA and pH adjustment when I first opened the pool.

    This is what I've read online, is any of this true?

    I've read that increasing (or decreasing) TA is a slow process.
    I've read when increasing TA, you shouldn't add more than 1kg (2.2lbs) of sodium bicarbonate per 50,000 L (13,000 gallons) of water.
    I've read that sodium bicarbonate should be added with the pump turned off, sprinkled in deep end of pool (in my AG pool anywhere), then wait 15 min (I've also read wait 2 hours) before turning back the pump. Then wait 3-4 days before re-testing level and re-adjusting.

    True, partially true, or myth?

    Thank you
    Round Above ground Cedar pool 18ft (approximately 30,000L = 8000 gallons), Hayward 2 speed 1.5HP pump, Hayward XStream Cartridge filter, Hayward Titanium HP50B 55,000 BTU heat pump, Hayward offline chlorinator, Big dipper ozonator.

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    DaninFLA's Avatar
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    Re: Some basic questions!

    i wouldn't worry about your TA, its fine. its above recommended level but its nothing to worry about. higher TA will drive your pH up, but you will be adding muriatic acid to lower it. this process of constantly lowering your pH and then it rising back up with lower your TA over time. you will find that you will not have to adjust your pH as much and it the TA/pH will be more stable.

    if you want to raise pH, aim one of your returns at the surface of the water. the extra agitation/aeration will raise pH

    EDIT: I saw you mentioned you use pH down. don't buy any more of that stuff. best option for lowering pH is muriatic acid, about $7 for a gallon at one of the big box stores. doenst take much either.

    and your FC is way too low for your CYA. don't use trichlor, it will raise your CYA. liquid bleach/chlorine is best.
    Dan
    9,000 gallon in-ground Saltwater pool, plaster, cartridge filer, 1.0 hp pump, Hayward T-15 SWCG, TF-100
    Pool School - Chlorine / CYA Chart; Pool School - Test Kits Compared;

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    poolnoob.ca's Avatar
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    Re: Some basic questions!

    in canada you can get muriatic acid at canadian tire or home hardware in the paint section (no idea why they keep it there) e.g. this

    you can use trichlor, but as you may know you will gradually have to increase your target FC all summer long as the CYA builds up.

    as for TA, raising it is fast and easy with baking soda. as dan said above, lowering it is slow as you must decrease the pH to 7.0-7.2 with acid, which will also lower the TA, then raise it back up with aeration, and repeat the cycle until TA is where you want it.
    32,000L Fibreglass Leisure Pools IG 12.5'x23'x5' Pump: AstralPools BX1 1.0HP
    Filter: AstralPools ZX-310 SWCG: AstralPools VX7T
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    Mod Squad kimkats's Avatar
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    Re: Some basic questions!

    Good job getting a good test kit!

    You can use the pucks or whatever you want to deal with your FC BUT your FC is way low! You need to get some bleach/chlorine and plan on adding it every day as you are heading to an algae bloom if you keep on where you are at.

    Let us know how else we can help!

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: Some basic questions!

    Thanks a lot for all the responses.

    Please correct my chain of thought here about TA.
    Because my pH was always crawling up to 8, I decided to have the TA in the 100-120 range (the higher limit of normal found on the back of the TA+ bottle that I had bought from pool store), thinking that if I have more of the buffer, I wouldn't have to adjust pH as often. Also thinking that since I'm using trichlor which is acidic, might as well keep TA slightly higher. But from some of the threads I've read, people seem to have more stable pH at lower TA around 70.

    As an aside, I have some pH minus from pool store that I had bought last fall. I was going to finish it, then switch to muriatic acid. We do partially drain pool for winter closing yearly, so I shouldn't have trouble with sulfates. Hopefully.

    Thank you
    Round Above ground Cedar pool 18ft (approximately 30,000L = 8000 gallons), Hayward 2 speed 1.5HP pump, Hayward XStream Cartridge filter, Hayward Titanium HP50B 55,000 BTU heat pump, Hayward offline chlorinator, Big dipper ozonator.

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    Mod Squad kimkats's Avatar
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    Re: Some basic questions!

    Please use these levels as a guide. They are proven time and again to work with solid science behind them.

    http://www.troublefreepool.com/conte...mmended-levels

    I found this summer that my TA was a little high for my pool (TA100) and that caused my PH to raise faster than it used to when I kept my TA at 75. Once I dropped my TA down to 75 my PH stabilized!

    Just some food for thought.

    Kim

    - - - Updated - - -

    Please use these levels as a guide. They are proven time and again to work with solid science behind them.

    http://www.troublefreepool.com/content/134-recommended-levels

    I found this summer that my TA was a little high for my pool (TA100) and that caused my PH to raise faster than it used to when I kept my TA at 75. Once I dropped my TA down to 75 my PH stabilized!

    Just some food for thought.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

  9. Back To Top    #9

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    Re: Some basic questions!

    Yep...get some chlorine in there as Kimkats stated. As you move along in testing your Ph and TA you will find that "sweet spot" for the TA/Ph relationship. My Ph stays very stable when my TA is 100-110.
    17,500 gal. ABG Doughboy Pool
    1/2 HP Pump/150 sq.ft. Cartridge Filter
    TF100 Test Kit And Speedstir

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