My bro, who is a very experineced AS user, made me 50ml of Fina at 90mg/ml....i have had it for around 2 months stored in a dark, dry place...i got it out tonight and this thich floating mass had formed at the bottom, so i vigorously shook it up. it is now kinda thick like watered down Tussinex cough syrup or something....is this normal?

i also want to use 25g needles...good idea?