I'm currently designing a sump for my 55 gal tank and need some input on some good in-sump skimmers and return pump for it. I'm thinking a 20 gal sump or higher as I might upgrade the show tank to ~100 gal in the future and don't want to have to build a new sump. The return line will be around 4'. I'll need the most effective while being fairly quiet for the skimmer. Any help will be appreciated. Thanks!