[BobAlston]

For pressurized co2 systems, take a look at the information I have collected:

http://members.cox.net/tulsaalstons/AquaticPlants.htm#High Pressure CO2

Update 5/5/2006: My web site is now here:

http://webpages.charter.net/bobalston/AquaticPlants.htm#High Pressure CO2

Bob