I have an entirely external system for my ADA 60-P with a canister filter as well as inline heating and CO2 diffusion. I was wondering if anyone has had any experience connecting an air pump to the same diffuser as their CO2 (I would prefer is all goes in line instead of in the tank). I would connect them through a Y shaped check valve leading into a Jardli in line diffuser. I understand it is one way for fluid but I was unsure if it would be the same for gas and if the high pressure CO2 cannister would push the air out of the other line and leak out. If anyone has any experience or thought please let me know!