Yeah grey tops?
All mine have been 10iu yellow tops, but I know you can get blue too obviously.
If it were me in your boat, I'd do a Human Chorionic Gonadotropin (HCG) test (pregnancy test), if all good then I'd give it 2 days of injecting and go get a test done for hgh levels in your body, but shortly before the test, pin the growth. You'll soon know whether it's bunk or Atleast growth and not just Human Chorionic Gonadotropin (HCG) powder.
What's this about it being stuck on the bottom, the powder? That's never happened to me. How'd you reconstitute it? Release the vacuum and inject the bac down the side of the vial slowly before swirling it gently until it mixed or am I mistaken by that comment?
As for how much iu to pin daily, that depends on what your using it for? Anti aging I'd use 2-4iu, building muscle I use 4-8 a day.