Planning on upgrading to a 90 or 125g reef and will use my 55g as a sump. I was planning on creating 3 sections within the sump and will use one for a protein skimmer and since I have seen so many different sump variations as to what to do with the other 2 sections so I am a little confused. Any ideas as to what would be best for me?? I plan on keeping fish and some hardy corals at first then see how that goes and move from there. Thanks