I don't have an Eheim filter but I did get a Rena Filstar recently. Congratulations on getting one of the best canister filters that are made. I've found that they are great to use, especially with planted freshwater tanks, and should help with saltwater tanks as well. They are quieter, more efficient and clutter up the tank less.
Gene Heitman - 12 tanks (11 freshwater and 1 saltwater), 206 gallons, 20+ species of fish/shrimp/snails, 52+ species of plants ... 10 years ago I just wanted 1 tank with some fish