Yes but supposedly the CO2 will make the water more acidic and ruin the propeller and whatnot down the road. Other than that and you dont mind the electricity, then sure.
Just DIY a reactor. Your Eheim pro pump is powerful enough to push through, might be too too powerful even. Fill it up w/ bio-ball to trap the bubbles. Make it streamline, straight w/ no elbows, if you're particular about flow. Help a lil bit.