What's the difference between SW and FW test kits?

Discussion in 'Water Chemistry' started by stauchistory, Oct 2, 2010.

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  1. stauchistory

    stauchistory Feather Duster

    Aug 8, 2010
    Spring Grove, PA
    I was just curious what the difference is between SW and FW test kits. How will readings be different is you use a SW kit to test FW, and vice versa?
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  3. 2in10

    2in10 Super Moderator Staff Member

    Aug 6, 2009
    Sparks, NV
    SW has many more chemicals in it and this needs to be accounted for in the type of reagents used. If the kit is listed for FW or SW then the manufacturer is stating that the results are accurate for the type of water it is listed for only. So use the kit for the type of water it is rated for.