Hi, I am hoping someone with some experience of this can help. I am currently running two filters on an Aquascaper 1200 however only have one CO2 inline diffusor. Studying the microbubble distribution around the tank, one end has far more than the other. I have a powerhead in there and have been playing around with the circulation but cant seem to get the distribution where I want it. I was thinking this may be helped by adding another inline diffusor to the other filter using the sort of two way splitter CO2 supermarket sell. I was wondering if anyone had tried this? and what sort of working pressure I would need? I am currently using a CO2 art pre se which goes up to about 50PSI (even though its meant to be capped at 40) will this be sufficient for 2 inline diffusors in this arrangement? I guess the other option is to upgrade to one of the regulators that has multiple manifold blocks and higher working pressure but that is a much more expensive proposition!