hi guys, it's time to mix again my hcg with bacteriostatic water. I need to use 5 to 10 ml of bacteriostatic water to make my solution. I have my bacteriostatic water in a 30ml vial.I used 10ml of bacteriostatic water in this vial 2 months ago, then i store the vial in a dark place. Can i still use the rest of this bacteriostatic water (unmixed) or should i toss it. I still have 20ml.