IT really depends on your consumption rates and your system volume. I go through twice as much Calc then Alk so it makes sense
Are you sure the concentrations of each component are the same though? Just because someone is adding 50ml of alk and 100ml of ca does not mean they are actually adding twice the amount of ca as Alk....most likely the case is that the concentration of each additive is different...
Also, an established system will never use alk and ca at the same amount over the same amount of time.... Both are not being used up at the same time together....depending on when you are testing can mean different readings....however, both should be consumed or depleted in approx the same amount over the longer term.... Like for instance 1-2 months.... But in short term you can see one getting used up more than the other only because of what I have mentioned above.
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