IME rez effect (reservoir) is the easiest to remember ratio wise (it's 1:1 equal parts, grain spawn : field capacity vermiculite) I use it because once I mix my spawn with pasteurized verm, I put a lid on it (tupperware or to go containers), let it colonize, consolidate and I remove the lid and throw into my fruiting chamber.
I use it because there are little nutrients in the verm, low chance of contamination, and a wide range of colonization temps in my small space.
Dub (double) tubs are typically 2 shoebox size tubs attached to one another which serve as it's own micro-environment/fruiting chamber (they could in theory be any size, I think eatyu's tek is larger):
I saw your question regarding fruiting chambers on another thread and here's my newest one that works gangbusters for me and my situation. You should definitely wait for other more experienced members to chime in but I thought I'd at least start to answer your questions as I have little to no life.
Edited by catattack, 05 December 2014 - 05:32 PM.