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Like many others, I find the "actual volume of water" checkbox confusing. By inputting 1 teaspoon of KNO3 into a 75 gallon tank, I get the following numbers for nitrate:
75g, (box unchecked)
  • 11.51 ppm
    75g, (box checked) 13.65 ppm
    64g, (.85 x 75) (box checked) 15.88 ppm
    64g, (box unchecked) 13.49 ppm
    Options 2 and 4 seem to be in agreement, but seem to run counter to what I would expect. Could someone clarify this for me?

    Also, (and this may be a dumb question) but we are referring to dry measurements of KNO3 here, aren't we?

    However, when adding 1/3 teaspoon of Fleet Enema, does the Fertilator now refer to a liquid Measurement?
 
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