gen,

do you use the controller with a bottled tank of co2 like for fish to keep your ph down. I have been thinking of this but wonder if the co2 takes the place of the o2 in the water. I run connected dwc with air stones so I get lots of air but I always wondered if it was a problem. I mean they use it for fishes where they have to breath.. anyways how long have you been running this co2 system? and a little bit more tech side what happens to the co2 i know plants dont use it in their roots like they do under their leafs but is it convereted or does it escape as it passes thought the water and exit as co2 gas?
thanks