I use the equivalent of 2 grams of DRIED bud per tablespoon of butter. There are 32 tablespoons in a pound. If you use leaf, dry it and use 3-4 times the weight as you would using bud.
Instructions in 'medicated edibles'.

And remember: Don't count your chickens before they hatch. The questions you ask make it seem as if you have never grown before; you are highly unlikely to get even close to those results on your first try, and hydroponics is not very forgiving for a new grower who does not know how to troubleshoot the actual PLANT yet.