I am having a hard time deciding on a protein skimmer for my new tank. It is a 40b with a 20L sump below. I am considering the aquamaxx cones co-1, but I am concerned that it will be hard to get a high enough water level in the sump since it is only 12" tall. The other options are a Bubble magus curve 5 or a reef octopus classic 110 space saver. I have zero experience with protein skimmers and I really don't know what makes one better than another.