Yea I'm going to replace a reef octopus also my tank is 150 with 40 breeder sump I know some skimmers you have to double the recommended size of skimmer
I was running a curve 5 on my 40 with 40 sump. It was super quiet and pulled out some nasty stuff. The last 6 Months I used it I drained the skimmate back into the system. About once a month I would clean the collection cup and there would be 1/2" of mud gunk stuck to the side of the cup. I quit using it and quit pulling skim out because my system doesn't need a skimmer.