For those interested in setting up a Sodastream rig....
My set-up and approx prices as follows:
Sodastream bottle - $10 for 3 (1 bottle should last 2 months @ 1.5 bps, refills approx $12 from Farmers)
Regulator with solenoid - $90 (make sure you get a regulator with solenoid so your Co2 is on a timer)
Glassware - $20 (includes diffuser, check valve, drop checker and bubble counter
Adaptor for Sodastream - $30 approx http://cgi.ebay.com.au/soda-stream-adap ... 41567d8a81
Tubing - $10 (make sure it's Co2 proof)
Shipping - $35 (I ordered lilypipes and other items to save on shipping)
Under $200 for a very good Co2 rig
Check out http://www.fish-street.com
Essentially it's the same as any other Co2 rig, only you need an adaptor to fit the bottle. It is more expensive in the long run for refills but because I have 3 bottles, I never run out.
Hope this is helpful, I can photograph the assembly when my new tank is up and running....