[fedge]

I think this idea needs more people to test it out.. bigger tanks.. more co2 needs etc... Then maybe we can permenantly make it an article in the DIY. HOWEVER, before I jump the gun...I want to know how the high ammounts of CO2 will affect the window mesh material....If there is a better way, like hot glue, to attach the mesh (rubber bands will not last very long in aquarium that is sure). The pop bottle suggested would word OK.. but only for smaller ammounts of co2... or if you used more than one. If you could get a stainless steel top (threaded) with a ring that could screw down maybe that would solve a lot of problems.
NO suction cups needed, Easier to level, not as likely to rust or react.