There is waaaaay too much hype about skimmers. They all do a fairly good job and there isn't much difference in performance between an super expensive and moderately priced models. I have a Bubble Magnus Curve 7 on my 90. That's on the cheap side of the moderately priced category. It is ok, but the water level adjustment is very flaky. It overflows easily. It replaced an old Reef Octopus NWS-150 external that was just too big for my system. The old Reef Octopus was rock solid and still works today, it is just inefficient, big, ugly, and noisy. I think the Bubble Magnus Curve 9 would be slightly undersized for a heavily loaded 150. I would suggest the Classic 200 INT 8" from Reef Octopus. It is a good value at about $400.