I have great luck with the Aqua C skimmers.
I use the EV180 on my 200 gal frag tank
I use the EV240 on my 215 Show stank
I use the EV1000 on my 561 show tank
The EV180 is really a small unit but it gets the job done. I do not mess with adjustments on any of them after they are running at full...