[Canadian Man]

Dez, Like I told you tonight I believe the media does make a diffrence. When Tony tried to use the arragonite larger size sand it didnt work. When he went with ARM it solved his problems. Now of course an reverse flow(bottom up) reactor would solve this problem.

I think you would want the co2 before the pump impeller so it gets chopped up and is easier to dissolve.

As far as height goes it depends on what your set up is and if you are feeding from the sump for eg.

I always thought that I needed a pump to feed my reactor and that caused nothing but problems with output rates. Now that it is gravity fed it is rock solid!