Measuring and supplementing Potasium and getting a good estimation of net tank water volume

Koty

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Using the Salifert K kit, I found that my K went down to 340 ppm. Estimating that my tank is 400 liter, I dosed 240 ppm of TM K solution. After about an hour, I tested 430 ppm of K. Thus, based on the ratio of 400/430, I found that the net water volume was 372 liter. This is based on the hope that the Salifert kit is accurate. FWIW, it was accurate in measuring the Fauna-Marine multistandard.
 

Randy Holmes-Farley

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Using the Salifert K kit, I found that my K went down to 340 ppm. Estimating that my tank is 400 liter, I dosed 240 ppm of TM K solution. After about an hour, I tested 430 ppm of K. Thus, based on the ratio of 400/430, I found that the net water volume was 372 liter. This is based on the hope that the Salifert kit is accurate. FWIW, it was accurate in measuring the Fauna-Marine multistandard.

My expectation is that this calculation won’t be any better than an eyeball estimate. It has several sources of error, mostly from being due to a difference between two measurements, each with its own error.
 

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