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Thread: Frustrated in Ottawa

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    Frustrated in Ottawa

    I've been doing lots of research over the last week, along with multiple trips to the pool store, but I can't get rid of my algae.

    Here's the pool history:

    Had my 18' x 48" pool filled with a water truck about a week ago. Pool was used, bought a salt water chlorinator new to use with the pool. I accidently put a couple of bags of salt too many in the pool as it was filling, but only realized it after the guy left. So I had to dump some of the water and replace with well water. Bummer.

    My chlorinator would tell me salt was good, then 1/2 an hour later it was too high, then it would be too low. Called the company and they said wait it out over a couple of days. I did, same result. Exchanged the chlorinator for another, the same thing was happening. By this point the pool was starting to get algae, as there was no chlorine production. I shocked it when I put the second chlorinator in so try and limit the damage, but it kept going.

    At that point, I decided to go with a chlorine system. My 3-year old is dying to get in there so I thought this would be fastest.

    2 days ago I put 250g of granular chlorine in the pool. No change.

    Yesterday, I put 400g of chlorine in the pool. No change.

    This morning I went for another water test, here are the results:

    FC - 5.0 mg/L
    TC - n/d
    pH - 7.6
    TA - 180 mg/L
    CH - 220 mg/L
    CYA - 30 mg/L

    They tell me I needed 2.53 L of Muriatic Acid, I added 1.5L today and the balance will go in tomorrow morning. I also added 500mL of 40% algicide and another 500g of chlorine. Pool is still green!

    Any thoughts or advice? I'd love for my son to go swimming!

    Thanks,
    Pat Blake

    25,000 gal. AG Easy Set pool, cartridge filter
    Pump: F1000C, 80 watts, 2.2 amps, 1075 GPH, HP unknown

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    Join Date
    Jun 2010
    Location
    Toms River, NJ
    Posts
    80

    Re: Frustrated in Ottawa

    First, thank you for the updated test results. These go a long way towards helping you. I, personally, have one problem though. I cannot convert mg/L to PPM. That seems to be the standard for terminology here. Second, just a word to the wise. Pool store tests will suffice in a pinch but have been known to be very inaccurate at times. I would suggest you get a quality FAS/DPD test kit so you KNOW what your levels are. We can work off the pool store tests until you get one. That is as soon as I find a conversion for mg/L to PPM.
    18'x24' (10,000 gal) above ground pool, 19" Proline sand filter (45 GPM), Jacuzzi 1.5 HP 2 speed pump

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    Join Date
    Jun 2010
    Location
    Toms River, NJ
    Posts
    80

    Re: Frustrated in Ottawa

    Go figure! It's a one to one conversion, almost. The decimals are so small I'll ignore them though. So, test results as follows:

    FC 5ppm
    PH 7.6
    TA 180ppm
    CH 220ppm
    CYA 30ppm

    No CC reading. I'm sure its above 1 though being that you are having an algae problem. Your FC is dead on for maintenance levels however you need to shock, and fast by the sounds of it. That means raising your FC to 15 (according to pool calculator) and holding it there until:
    1. Your CC is less than 1.
    2. Your pool is sparkly and clear.
    3. You have an overnight chlorine loss of less than 1ppm.

    Please use unstabilized chlorine (bleach or liquid chlorine) as you don't want to raise your CYA any higher than it is already.
    18'x24' (10,000 gal) above ground pool, 19" Proline sand filter (45 GPM), Jacuzzi 1.5 HP 2 speed pump

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    Join Date
    Dec 2009
    Location
    Central Massachusetts
    Posts
    2,690

    Re: Frustrated in Ottawa

    It's the same thing, for all intents and purposes here. mg/L=ppm.

    A ppm is a mg/kg. But, a liter of water at 4 degrees C weighs 1 kilogram, so 1mg/L=1 ppm. give or take based on temp.

    So his results are the same as what we use for ppm.

    Edit: ok, you beat me to it.
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

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    Join Date
    Aug 2009
    Location
    North Central Texas
    Posts
    1,358

    Re: Frustrated in Ottawa

    Does any of the sanitizer you are using have copper in it? How about the algaecides? Copper can give the water a green tint especially if TA and CH are not "balanced" for the combo with a normal to high pH. Did you truck in water because of the high metal content of your well water, maybe iron? Did you get initial reading on the trucked in water? What is it's source or what do you know about it?

    Is the pool green cloudy or green clear?

    gg=alice
    1981, 25K, IG, Blue Plaster 1996, somewhat oval, widens a bit at shallow end, 1.5" pipes, 2" at Pad, 1 separate main drain, 1 skimmer, 4 returns + dedicated cleaner return, 10 ft deep end with very fast decline from shallow, Pentair Quad 80 DE, Pentair Intelliflo VF, 3/4 HP Booster Pump (equipment pad about 8 ft below top of pool), Challanger 3/4 Trash/Emergency Pump 120v, Polaris 280 (pressure), iRobot Verro cleaner (robotic), Aquabot Turbo (robotic), Jacuzzi Tracker 4X (vacuum) Pool Blaster (Buster), Two (2) PoolSkims, Solar Breeze (solar powered top skimmer) (beta to ver. 2, release date 2010), ColorSplash LED replacement bulb. Aries 550 gal separate spa, 2002 (our 3rd and BEST spa) , BBB-Bromine

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    Re: Frustrated in Ottawa

    Thanks for the replies. Can I use granulated shock? No copper in anything.
    Pat Blake

    25,000 gal. AG Easy Set pool, cartridge filter
    Pump: F1000C, 80 watts, 2.2 amps, 1075 GPH, HP unknown

  7. Back To Top    #7

    Re: Frustrated in Ottawa

    Well, it seems I've figured out the problem. Seems that my iron filter was not filtering as it should, and the green in my pool is a reaction between the salt and the iron.

    My chlorine is so far off the chart it can't be measured, so algae is NOT the problem. That's the good news. The bad is that we could have been swimming this entire time, and now we (mostly my 3 year old) have to wait longer to get in the pool.

    Thanks for all the advice.

    Pat
    Pat Blake

    25,000 gal. AG Easy Set pool, cartridge filter
    Pump: F1000C, 80 watts, 2.2 amps, 1075 GPH, HP unknown

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