I've got access to the full text of the paper Marcel highlighted.
The schematic diagram of experimental facilities used for carbonation of pond water. (1) Raceway open pond; (2) pump; (3) air diffuser; (4) venturi; (5) CO2 flowmeter; (6) CO2-air pressure cylinder; (7)...
I wonder if it is just to do with storage of the gas. It wouldn't work for pressurised gases, because they would just vent straight through the venturi pipe into the tank in a "tank dump".
I run a venturi on a relatively small through-put pump, and it seems pretty efficient, but it...
I think it is just the flow speed, the faster flow speed through the restricted section causes a drop in pressure (energy is conserved, kinetic energy has increased, so the pressure must fall) and the CO2 is sucked in to the flowing water. If the water has to flow any distance (before...
I like Killis, a lot of them are the perfect nano-fish, and some (like Normans Lamp-eye) are a easy to breed as well.
My real reason for posting was to add that as a lot of Killifish need live food it is a perfect place to pick up live food cultures like Fruit-flies etc as well...
Re: Living Waters - Threadfin Rainbows
Like the photo of the moss tank. Did they have any female Threadfin rainbows? I'm still struglling to find some. Aquajardin (S. of Gloucester) had some a couple of months ago, but I failed to buy them whilst I was there.