04-11-2005, 01:32 PM
Join Date: Nov 2004
If you search around here a bit, you can find many threads with similar questions and answers...
In brief, if you buy all new, the minimum you'll need is a regulator, check valve, bubble counter, and a CO2 tank. You could also add a diffuser or inject the CO2 into your filter for mixing.
If you get a fish-specific regulator, you'll probably spend ~$70 or more, depending on what accessories you get. Price of a CO2 tank will vary depending on size and whether or not it's used, but figure at least ~$50.
Check the forum sponsors and eBay for the parts...