hi, regarding diy co2. i have 2 2l bottles on my 120l but this is not enough. i have 2 diffusers in the tank, however can i run 2 bottles on one diffuser. for example. have the airline comming out of the bottles and going into a T connector. so both bottles are run from one diffuser if you know what i mean. so that means i can run both bottles on one diff. or i can run 3 bottles off 2 diffusers. will this work? or will one bottle just push all the co2 into the other bottle?