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Thread: Chlorine test to use less drops when checking high chlorine leve

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    Chlorine test to use less drops when checking high chlorine leve

    Chlorine drop test. With powder.
    15,000 gallon inground fiberglass pool with spa. 350lb Sand filter, 1.5 hp pump, and heater

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    Re: Chlorine test to use less drops when checking high chlorine leve

    Are you using the 25ml or the 10? You can use 5 and count each drop as one. It's not quite as accurate, but works as long as it's not for an OCLT.
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    Re: Chlorine test to use less drops when checking high chlorine leve

    My kit uses the 10mil instructions

    - - - Updated - - -

    So i can use 5mil and use the same 1 heaping scoop?
    15,000 gallon inground fiberglass pool with spa. 350lb Sand filter, 1.5 hp pump, and heater

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    Re: Chlorine test to use less drops when checking high chlorine leve

    Just did the test twice,

    5mil. 17x1. =. 17
    10mil. 27 x .5 =. 13.5

    Also you can be + or - a few drops to 5mil or 10mil mark
    15,000 gallon inground fiberglass pool with spa. 350lb Sand filter, 1.5 hp pump, and heater

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    Mod Squad jblizzle's Avatar
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    Re: Chlorine test to use less drops when checking high chlorine leve

    Small volume variations cause a larger error when the sample is smaller.

    We generally do not recommend the 5ml test method ... Even if many members seem to suggest it to save a few pennies.
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    Re: Chlorine test to use less drops when checking high chlorine leve

    Quote Originally Posted by jblizzle View Post
    Small volume variations cause a larger error when the sample is smaller.

    We generally do not recommend the 5ml test method ... Even if many members seem to suggest it to save a few pennies.
    +1

    A 2oz bottle of R-871 is $11, at the advertised approx 140 tests per bottle, that's $0.08 per test.

    The added errors in using 5ml could lead to an algae bloom, where any savings in test reagent will be swallowed by the added chlorine cost to clear the algae.

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