I see, all you really need to do is decide how strong you want your e-
juice to be.
I believe that the Eco Pure Krystal is 36mg strength (check this though, I could be wrong)
So, if you wanted 18mg strength
juice, you would simply mix 1 part Krystal with 1 part VG/Water (50/50 split)
If you wanted 12mg strength, you would mix 1 part Krystal with 2 parts VG/water
If you wanted 9mg, you would mix 1 part Krystal and 3 parts VG/water
...and so on.
Hope this is of some use.
.