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Thread: How do i dilute fas dpd for fc test?

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    How do i dilute fas dpd for fc test?

    Do i fill the container with 5 ml of pool water and the other 5 with tap water that is well balanced with a ph of 7.5 and alc of 90.

    If i understand it right i would just have to count each drop as 1 ppm.

    Ps i have high fc right now and i dont want to waste all my products.
    42,000 liters inground pool
    swg aqua rite
    Hayward super filter sand
    Vinyl lining
    Haward 1.5 hp pump

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    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    SW Indiana

    Re: How do i dilute fas dpd for fc test?

    Don't use tap water unless it is unchlorinated well water. Just mix together equal parts (cups, shot glasses, tablespoons or whatever) of pool water and unchlorinated water. Then fill the sample tube with the mixture.
    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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    Re: How do i dilute fas dpd for fc test?

    distilled water is unchlorinated.
    POOL: Intex ultra new in 2014 (32 x 16 x 52) (seasonal; on concrete pad covered with 1.5" extruded or whatever foam insulation sheets - ugly, but comfy); added a through-wall skimmer; I add salt for feel. EQUIPMENT: Pentair SuperFlo pump (1HP, 2SPD); Pentair cartridge filter (200 sq. ft); Pentair MasterTemp natural gas heater (400,000 btu) Climate/Location: Eastern Nebraska

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