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Thread: Nitrates - Need Advice

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    Exclamation Nitrates - Need Advice

    I am the head manager of a summer swim club in New Jersey. 200,000 gallon main pool. 8 Lane Competitive pool. The pool is winterized but water is still left in there for the winter. Cover came off Saturday and I have 60 ppm of Nitrates in the pool. Typical algae on bottom of pool and cleaning that still. Does anyone know of ways that I can get rid of the nitrates? Last summer I had to drain the 200,000 gallon pool and call in a favor from the local FD to fill it back up before the BOH inspection. Thanks for the help.

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    Mod Squad woodyp's Avatar
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    Re: Nitrates - Need Advice

    How do you think the nitrates get in? Fertilizer? Welcome to the forum.
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    Re: Nitrates - Need Advice

    Is this indoor or outdoor?

    How did you test for nitrates?

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    Re: Nitrates - Need Advice

    To be honest, that's a thought I had. Being that it is a HUGE pool, the surface area alone could catch the fertilizers. I even thought it could be that I also have a lake with Geese and Ducks around. But there is not evidence of them being on the cover while it is on and being taken off. There are a lot of trees on the grounds. So maybe even the decaying leaves on the cover too.


    Thanks!! This site is super helpful, it's my third year as the Head CPO at this site and this is the only pool that I have dealt with this problem

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    Re: Nitrates - Need Advice

    Outdoor Pool. Used the Nitrate Test Strips that you get at the local pool store.

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    Re: Nitrates - Need Advice

    Just curious. Residential pools don't care squat about nitrates. I assume you have a governing body that has a limit you can not exceed, is that correct
    Dave S.
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    Re: Nitrates - Need Advice

    Correct duraleigh. I am a community club that has to follow Board of health guidelines with regards to the levels of the pools.

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    Re: Nitrates - Need Advice

    I could tell you what to do in a pond or aquarium. In a pool, you really only have a few options. Reverse osmosis, or replacement. There is a process that works like a water softener but it's not intended for 200,000 gallons.

    Maybe one of the resident chemists has an idea...
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    Re: Nitrates - Need Advice

    I am a community club that has to follow Board of health guidelines with regards to the levels of the pools.
    What are the guidelines for nitrates? What is the most you can have? What increments? ppm?
    Dave S.
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    Re: Nitrates - Need Advice

    Quote Originally Posted by duraleigh View Post
    What are the guidelines for nitrates? What is the most you can have? What increments? ppm?
    I'm curious, too. I looked up the state rules http://www.state.nj.us/health/phss/d...recbathing.pdf and neither nitrate nor phosphate appear when searching the text.

    New Jersey does appear to be somewhat enlightened. CYA is supposed to be between 10 and 100, with 30-50 as ideal. Too bad the FC levels aren't adjusted upwards to match the CYA.
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    Re: Nitrates - Need Advice

    That's what I found, also, Richard. I thought the CYA table was interesting but lacking.
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

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    Re: Nitrates - Need Advice

    Duraleigh, (or anybody)--------is there a more accurate testing method for nitrates than the notorious test strips? That could be half the problem right there.
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    Mod Squad pooldv's Avatar
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    Re: Nitrates - Need Advice

    Aquarium and pond stores have a wide variety of nitrate tests, drops and strips.
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    Re: Nitrates - Need Advice

    Unless I am missing something, I don't find a requirement for a maximum level of nitrates in NJ. Let's find out what that level is (if any) before we chase a nitrates test.
    Dave S.
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    Re: Nitrates - Need Advice

    wonder if GPBLCC is extrapolating from the municipal potable water regulations?

    GPBLCC = Greenwood Park Bells Lake Community Club ??
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

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    Re: Nitrates - Need Advice

    Because of my presence of the nitrates my cL levels are being altered. I am going to be doing a phosfree treatment to help lower my phosphates and help with the nitrates. All the local pools in the area are experiencing the same thing that I am dealing with. Yes, I am with Greenwood Park Bells Lake. The NJ BOH does not in fact test for the nitrates, but with trying to stay within a budget with my chemicals Nitrates throw me off completely. I spoke with the Pool Operation Management and this was their suggestion for me and the pool. Ultimately, I was trying to find a solution to the Nitrates without draining the pool and scrubbing it. Which was not fun last summer at all. Thanks to everyone for the insight. Now I can say I have a solution to the problem (knock on wood)

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    Re: Nitrates - Need Advice

    I think that you would do well if you just kept the fc at about 15% of the cya. For example, if your maximum allowed fc is 5 ppm, keep the fc at 5 ppm and the cya at 30 to 35.

    Nitrates and phosphates don't directly affect fc. Only when algae is allowed to grow does fc begin to be depleted. However, it's the algae consuming the fc, not the nitrates or phosphates.

    Therefore, if you simply maintain adequate fc/cya ratios, you won't have to worry about nitrates or phosphates.

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