I've been thinking of upgrading my skimmer and have been looking into the Octopus skimmers. I presently have a Coralife Super Skimmer, but think it could do a better job. I haven't had all the problems that some have mentioned, like overflowing, but I think it could do better. So, if I went with Octopus, which one?? Is there a less expensive skimmer that would do better than what I have?? I need an in sump that doesn't have a bigger footprint than my present skimmer, which would be 10"x8". I have a 90 gal tank with a 30 gal sump. Suggestions?