[Aquattro]

Sorry Steve, gotta disagree. While H2O is a solvent, there are many other natural solvents. Hexanes and ethanes come to mind. Again, the solute will determine how well the solvent will work. As to CO2 in RO vs. Sea water, I'm sure there is way too much math involved to answer that with a simple yes or no. Temp, pressure, O2 levels will all play a role.
Darren, do you have a reason to feed RO instead of sump water? Some cool link we can read about chemistry? [img]images/smiles/icon_wink.gif[/img]