DIY Co2 injection.

[NightFlight <nf at goosystems_com>]

Does anyone have any good links for Co2 injection, particularly places 
that mention canadian retailers for sources of co2 equipment such as 
tanks and pressure guages, ph controllers... etc.

Usually purchasing anything that has to do with aquatic fish is marked 
up a couple times over a realistic price. The last thing I want to do is 
pay more than I have to for a controlled co2 injection system. If I can 
pay say $500 where buying a kit would set me back $1000, I'll go for the 
$500 and the slight headache of DIY any day.

Chris.