I have been using the RC chemistry calculator for some time but have been trying to be more exact as to how much of each additive I need to dose to make corrections.
The problem is this: in my 125 gallon tank with sump, I started with a Mg++ of 1200 ppm and added 1000 ml of ESV Mg, which raised the Mg++ level to 1275 ppm (+75 ppm). I then added another 1000 ml of ESV Mg, which raised the Mg++ level to 1425 ppm (+150 ppm). So the first dose raised the Mg++ 75 ppm, and the second (same) dose raised the Mg++ 150 ppm! A similar incongruity happened in my 25 gallon tank with sump.
What am I missing? Is the dose/change equation not "linear"?
Randy or any other chemistry Wiz?
The problem is this: in my 125 gallon tank with sump, I started with a Mg++ of 1200 ppm and added 1000 ml of ESV Mg, which raised the Mg++ level to 1275 ppm (+75 ppm). I then added another 1000 ml of ESV Mg, which raised the Mg++ level to 1425 ppm (+150 ppm). So the first dose raised the Mg++ 75 ppm, and the second (same) dose raised the Mg++ 150 ppm! A similar incongruity happened in my 25 gallon tank with sump.
What am I missing? Is the dose/change equation not "linear"?
Randy or any other chemistry Wiz?