Originally Posted by orfy
All the crystal I have bought has been crystal 55.
I've never seen darker.
Hmm, interesting - I suspect I may be still in the brewing dark ages! I may also be overgeneralising from where I get most of my brewing supplies, which is Hop & Grape. They sell C120, and also C55 which (I think) they label as being an unusually light form of crystal. And apart from a couple of small local brewshops, that's the extent of my experience. So if you've seen C55 as the most common form of crystal over here, then I suspect it'd be a wiser move to go with that as the standard form of crystal, as I believe you're some way more experienced at brewing than me.