I am a bit torn. I thought I read that having good movement over the water surface will increase oxygen that I need to get into the water for my bacteria colony to start up with. But, at the same time, I have live plants and every bubble caused by this flow of water over surface makes me wince thinking that I am losing CO2 (for which I don't have a CO2 system so Carbon seems to be a valuable commodity for me) to gain the oxygen.
Is there a good balance between completely submerged water flow from a cannister filter water return and having some surface movement to get oxygen in? Should I put it right at surface? Completely submerged? or some splash to get the water surface breaking and oxygen in tank for bacteria?
I am still in my cycling period of trying to grow the bacteria colony, so I was thinking I should favor oxygen intake over CO2 for now and hope my plants survive? Would supplementing lost CO2 with Flourish Excel be a good substitute?