Tom and fellow members,
I'm wondering how much surface agitation you can get away with, without
depleting CO2? Does the most minute agitation blow off CO2? Or does it take
a lot? On some of my tanks I have these homemade de Bruyn filters that act
like mini wet/dry filters:




This filter is air-powered where the water is transported up to the raingutter
by sponge filter, then drips back into the tank like gentle rain. Even without
CO2 injection, DIY or otherwise, plants grow slow, but healthy growth. Would
like to experiment with a few of these setups with DIY CO2, but if this filter
is going to drive off the CO2 injected....what's the point. All comments are
appreciated.

Bill