On my 75 gallon tank, I have a Rena XP3 and and Eheim 2217. The XP3 is hooked up to my DIY Rex reactor, which is 2" in diameter and about a 16" long. I am not getting much output from the XP3, is this filter too small for the reactor or is the reactor too big for the filter? I have the Eheim spray bar on the left side blowing to the right and the XP3 spray bar blowing to the left. The Eheim is just too strong and the flow is keeping the co2 to the right. Got any suggestions on how to get the flow of CO2 to be all around the tank?