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Re: [APD] Qs re dKH maintenance
Sure, the margin of error looks fine to me for our purposes. But I'd
suggest thinking about and explaining where the 52.8 is coming from --
without the units and explaining the conversion, it's a magic number.
On Fri, Mar 23, 2012 at 1:10 PM, Carlo Flores <apd at petalphile_com> wrote:
> Sure, the margin of error looks fine to me for our purposes. But I'd
> suggest thinking about and explaining where the 52.8 is coming from --
> without the units and explaining the conversion, it's a magic number.
> On Fri, Mar 23, 2012 at 11:04 AM, <rader at hep_wisc.edu> wrote:
>> > Your bicarb calculation should be mg bicarb = gal of water *
>> > 3.785L/gal * 30mg/dKH * delta dKH. Depending on your baking soda and
>> > how well you pack it into the tsp, you should have about 4.8g per tsp
>> > of baking soda.
>> > I think you excluding units in this calculation and using 5.28 is
>> > confusing (but gets you pretty close. Rule of thumb is 30mg baking
>> > soda raises 1L by 1dKH, as per the formula above.)
>> Actually, typo, that should be "52.8.".. so we have...
>> you: 30mg_bicarb/L/dKH * 3.785L/gal * 1tsp/4800mg = .0235 tsp/gal/dKH
>> me: (1/52.8)tsp_bicarb/gal/dKH = .0189 tsp/gal/dKH
>> ...so we're probably within +/- the variation from packing of the
>> baking soda?
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