Did my first cycle of test e and deca 300 a few months back. Doses were 450mg test and 300mg deca a week split over 2 pins, Mon and Thurs. I also did Dbol for first 4 weeks at 30mg a day.

At these doses I doubt you'd have a problem with libido or gyno, I didn't but depends on your body I guess. 300mg deca won't effect your libido but if your worried about gyno and start getting itchy nipples just add some AI in later on.

Don't know about the bacteriostatic water. Maybe some one else can help with that.