I have a 55 gal SW tank, fish only, which has currently been running on a Emperor 400 for the past 8 years. I decided to change over to an Eheim 2026 canister filter. Just wondering how I should make the change over. Should I run both side by side for a while to allow the bio-load to establish in the canister before removing the Emperor? If so, how long should I wait to remove the Emperor?