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Thread: Question about graduated cylinders

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    Question about graduated cylinders

    I have accumulated a fairly complete test kit and am curious as if there is any problem using the same graduated cylinder to perform all the different tests that I do. I have a kit that tests Chlorine, Bromine (Using MPS removal drops), TA, Calcium hardness, Salt, and phosphates all using drop tests with graduated cylinders. Should any of these be done in a separate cylinder?
    20K Gal Blue Plaster IG with rock waterfall, Beach Entry, Hayward Goldline Pro Logic controller and SWG,
    Sta-Rite System 3 S7M400 cartridge filter, 1-1/2 HP pump, Energy Therm Heat Pump, Nexxus Savi LED lighting

    500 Gal Dynasty Miramax Fiberglass Cinema Spa

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    frustratedpoolmom's Avatar
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    Re: Question about graduated cylinders

    Well, the FASDPD test tends to discolor the cylinder but other than that it shouldn't matter really. Rinse really well between tests. I use the same one that came with my speedstir for a lot of the tests..
    Helpful links: Pool School; CYA/Chlorine Chart
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    Re: Question about graduated cylinders

    Yep, just keep the FAS-DPD one separate. As long as the graduations are accurate, there should be no problem.

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    Re: Question about graduated cylinders

    Is it just an issue of discolored cylinders with the FAS-DPD? There is no interference with the other tests if I use the same cylinder and replace it periodically?
    20K Gal Blue Plaster IG with rock waterfall, Beach Entry, Hayward Goldline Pro Logic controller and SWG,
    Sta-Rite System 3 S7M400 cartridge filter, 1-1/2 HP pump, Energy Therm Heat Pump, Nexxus Savi LED lighting

    500 Gal Dynasty Miramax Fiberglass Cinema Spa

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    Richard320's Avatar
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    Re: Question about graduated cylinders

    Quote Originally Posted by kgriggs
    Is it just an issue of discolored cylinders with the FAS-DPD? There is no interference with the other tests if I use the same cylinder and replace it periodically?
    Just rinse them between tests. I have accumulated enough vials and stir bars so that I can run all my tests before I have to do the dishes.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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