Like Steve mentioned, the true test is seeing what levels you're getting.
There's a ton of other variables involved as well, in addition to the formula you're using to mix the recipe.
How much water splash and offgassing you have on your tank is a major factor as well, and isn't something easily predictable.
Like Steve said, the best way to know if you have enough is to calculate your CO2
level. You want to be in the 30-35ppm range.