I'm assembling a CO2 system. I want to purchase these items in the next two weeks or so. This is what I will get/make (please let me know if something is not necessary/wrong or missing):
10lbs tank - used from ebay...
duel stage co2 regulator (I see that ppl recommend a 'duel' one but why?) - is this one good: http://www.amazon.com/Premium-Series...=co2+regulator
needle valve - any special requirements or anyone will do?
solenoid - does it matter what kind? are they different kinds?
co2 drop checker
and I would like to make my own reactor/diffuser and bobble counter - do I need a counter if I will have a drop checker? Any good plans for a DIY diffuser?