Mar 28, 2009 #1 krap101 Aquarium Advice Addict Joined Feb 4, 2004 Messages 6,082 Location Roscoe, IL I was wondering if the bottom should be filled with water or if I should try to keep it full of co2?
Mar 28, 2009 #2 fort384 Dividing by 0 Site Team Joined Nov 23, 2008 Messages 13,931 Location Illinois There will be some water in it. So long as there is CO2 coming out when it is running it is fine.