Thomas Hillson wrote: > Even aquarium enthusiasts use supplemental CO2 to stimulate their plant > growth.
Actually, aquarium enthusiasts have the best case for adding CO2. CO2 in an aquarium is very rapidly depleted and/or stripped out of the water by any significant surface agitation, and a well landscaped tank is very densely planted. In that situation CO2 truly is rate limiting for photosynthesis. In a typical greenhouse I doubt that CO2 is rate limiting, but in a small, tightly sealed wardian case, it might be. Aquarists have also messed around with all the different methods of adding CO2 that you can imagine. Fermentation works well in small tanks, but requires constant maintenance. Dry ice is relatively expensive and and requires frequent purchases. The most cost-effective, low maintenance method of adding CO2 to an aquarium is a bottle of compressed gas and a regulator. I use a 25 lb tank for my aquarium, and I expect that it would work just as well attached to a wardian case or indoor growing area. Nick -- Nicholas Plummer [EMAIL PROTECTED] _______________________________________________ the OrchidGuide Digest (OGD) [email protected] http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com
