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Thread: Phosphates

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    Phosphates

    The local pool store keep telling me my Phosphates are way high (+1000). Should I be concerned? The water is clear and my chemicals are balanced - except for the Phosphates... Are they just trying to sell me expensive chemicals I don't need?
    Irvine, CA
    IG Plaster 12,600 gallons, saltwater.
    SWG
    D.E. Filter - 48 sq. ft. 96GPM
    1 1/2 H.P. pump.
    Kreepy Krawly

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    Mod Squad JohnT's Avatar
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    Re: Phosphates

    Quote Originally Posted by Claughaun
    . Are they just trying to sell me expensive chemicals I don't need?
    Yep.

    While phosphates are do feed algae, they won't cause problems in a properly chlorinated pool.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    linen's Avatar
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    Re: Phosphates

    Quote Originally Posted by Claughaun
    Are they just trying to sell me expensive chemicals I don't need?
    I vote yes, unless you have extra money you want to pour down the drain
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Phosphates

    I had 3000+ ppb phosphates in my pool but prevented algae from growing by maintaining the proper Free Chlorine (FC) level relative to the Cyanuric Acid (CYA) level. Others have had even higher levels -- not just high phosphates, but high nitrates as well. The thing is that providing all the food in the world for algae will not make them grow any faster than their limit due to sunlight and temperature and that's roughly doubling in 3-8 hours. If the chlorine kills them faster then they can reproduce, then they won't grow and your chlorine usage would be that of new algae getting blown into the pool which won't even be noticeable (i.e. loss of chlorine from sunlight is much higher than that).
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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