Can't believe the calculator - The Planted Tank Forum
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post #1 of 3 (permalink) Old 09-07-2016, 04:44 AM Thread Starter
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Can't believe the calculator

Trying out a calculator to mix DIY dry ferts into a solution to use with EI low light/weekly dose. This is for a 180 L tank (about 46 gallons) using a 500ml bottle and wanting to dose 5ml of solution 1x per week. The calculator tells me I need to put in about 19 tablespoons of KNO3 into the bottle. That can't be right?

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post #2 of 3 (permalink) Old 09-07-2016, 08:42 AM
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Yep that is right.

10 ppm is a lot to get in a 5 ml dose. Notice it tells you that's over the solubility limit. In other words that much wont even dissolve in 500 ML of water.

Need to adjust the recipe for larger doses, like 20 ML instead of 5, etc.

Personally I'd dose 5 ppm twice a week instead of all at once, a 10 ML dose should work for that.
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post #3 of 3 (permalink) Old 09-07-2016, 11:44 AM Thread Starter
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Thanks so much.
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