09-14-2006, 11:46 AM
Join Date: Nov 2005
Location: Cincinnati, Ohio
iTrader Positive Rating: 100%
Pressurized will probably be the best investment you'll make for your aquarium. Between dead yeast and sugar getting all over the kitchen, and my room smelling like bear, I don't know how anyone could do DIY CO2 for too long.
As for CO2 tanks, I got mine at a place listed as a 'natural gasses' place. I know welding shops sometimes have them, and brewing places sometimes have them, and even hydroponics places sometimes have them. Get a telephone book and call around. I have a 5# one which is plenty big for my 29 gallon for awhile. Some people get 10# so it lasts longer, and some even get the mamoth 20# cylinders. Determine how much it costs for each size, and how much a fill up is on each size, and you can figure out what size you need and how much it'll cost.
I know some people got tanks at fire extinguisher stores, but I'm not quite too sure what to look for or what you'd need in that department. I'm sure someone with experience there will be able to offer a bit more widom on fire extinguisher CO2 tanks