I don't know about the "octopus bh 2000 hob skimmer", however, I have a Remora and a Remora Pro and on both tanks, I love them. Drain feature is awesome and both are set to forget...
Only suggestion on them, is to use the largest pump recommended, increases performance. What I also like, is that I hardly ever clean them, and they both work great dirty. I mention this, because some skimmers have to be clean to work well and these guys work either way. However, every couple of weeks, I do clean them...
I had recently purchased the Remora and used vinegar water to break it in. It literally started pulling in a lot of gunk the first day...