I bought 120 ml's of hopscotch at 6mg. It doesn't seem to be strong enough for me. If I want to up it to 12mg's, what do I need to get in 120ml's to mix the two together to get to the 12mg's that I want????Me and mixing do not go together and I don't want to screw this up. Thanks for any help!!! End result would be 240ml's of 12mg's