The way you explained it is alittle misleading telling him 10 or 20 cc's. It would be 10cc of water for the total kit. 1 cc per amp. I don't realy understand your 300 units as that is the mark for a insulin syringe. That does't tell me, unless your talking about 300 iu's of GH and you want to figure from there. Is it all in one vial as I hope its broken up. Cause unless your doing weekly blasts it runs the risk of going bad.