To answer your question,It is 1/3 cup of the Mag Citrate each time(4 doses in 1 bottle) to equal the same amounts of the epsoms salt mixture.
So Instead of the Epsoms salts at 6 & 8 pm, then again at 6 & 8am the next morning, I use the magnesium citrate instead.It is much more tolerable to me.I actually like the lemony taste.
As far as the mixture goes, I just mix up the coca cola classic, safflower oil(I like this better too) and the lemon juice then drink it at 10 pm. You know the rest of the drill..
Let me know if you need anything else..