I hated the amps, but what I was told was too put 1cc of bac water, in the amp, mine was 5000iu's, so every tenth of a cc was equal to 500 iu's. He then told me to draw desired amount into pin. cap the pin, put it in the ice box. make sure you use a draw pin or it will hurt more. they dull very easy. 500 is what i do every three days starting and week 6 and go til pct starts. okay that was the source's directions. what I would do now is take the bac, water, mine was 30ml, draw out 25cc's, squirt down the sink. take one cc mix with hcg pellet, draw the cc back up squirt into remaining bac water. then you have 2000iu's divided by 5cc's, which equal's 400ius per cc. throw it in the fridge. and your good to go. HCG is good for about 60 days after mixing. What point in cycle are you planning on using? Its not really good to use with pct. You should be done with hcg, by the time pct starts. for example say your running a ten week cycle, that consist of test E and decca. I would start taking it at last injection, every four days, b/c this will last until the decca should be out of your system(21 days), the hcg will last 20. and then start pct. I would really recommend more hcg, start in like week six, at 500ius every three to four days til pct starts. this will just keep your body producing test, and not shutting down. one more thing, in the future i would get the 10cc btl of hcg, mine comes with bac water, you just add bacc water and you done. it even comes with directions. Gonakor