I have some questions about mixing hcg . I have a vial of 2000 IU hCG. I want to use 0.8 ml water bac. 2000 iu / ml. 0.1 ml = 250 ui. I can inject 0.1 ml? It is a little water? Another question: my hcg powder is like a ball. Not like sand. It's good? I have to keep refrigerated after bac mixed with water or should I keep hcg powder in the refrigerator ?