That really depends on the grade of MJ your using the stronger the MJ the less you need to use, but when I make mine I use a 1/4 oz per 2 sticks of butter so that would = 1/2oz to a pound of butter.
Maybe a touch to much on the nutes you should always start at 1/4 to 1/2 stength and build from there. And maybe drop your PH to like 5.3 to 5.8 for hydro growing. 6.0 or higher is more for soil growing.