I have had the DIY co2 going for like 2 days now and my fish arent looking too good at all. They have been gasping it looks like for air in the water. I havent had any surface agitation and the co2 has been pumping contastly, two bottles of it. i put an airstone in, took out some polyfil from my filter to increase flow in hopes to help increase fcirculation. i know the airstone kinda releases the co2 but the fish were all on the bottom in the plants not looking too hot.