Day 1 a couple of observations:
Flow seems much higher then when I was running the Rex Inline Reactor. I have Indian Almond Leaves in my tank that used to sit on the bottom now they are all jumbled around, may have to crank my 2217's back a little bit.
CO2 seems to disolve better at the same bubble count as before. My drop checkers which remained nice and green have now taken on more of a yellowish tint to them. I will confirm this later this week as I will replace the fluid in both counters out of a fresh 4 DkH Indicator from Cal Aqua.