My source only had china hcg, ive only used pharma grade before will it be less effective? Also whats the best way to mix 5000 ius of powder i got some bac water thab was sitting out, like 8 ml, if no good i can buy fresh bac water but im looking for a effective minimal mixture to do 250 ius with a slin e3d..also can i reuse a sterile vial where i had my previous hcg before thanks.