I run an XP1 on a 26 bowfront, and am happy with it - run an XP1 on a 33 fbh, and find it isn't enough, just dealing with it for now.
Run an XP2 on a 55g, and it isn't enough, had to add a powerhead for flow.
Bought an XP3 on that sale (which is good till Nov. 3rd) and plan to use the XP2 on this 33g cube, XP3 on the 55 for as long as it runs (shutting it down in February, and selling it off)... then figure out stuff then once I have the basement coming online. Will probably end up with 1 XP1 and 1 XP2 running on a tank 46-50g, XP3 on the 33g cube - and the 2215 in the 26g bowfront. Leaves me one XP1 left over, hmm.....
