I just got a 75 gal tank. I currently have a freshwater (with a few plants) 29 gal. that has been established for about 10 months. I know everyone talks about doing a fishless cycle for the new tank, but is it necessary? I only have one filter (Cascade 1000 canister filter) so I can't have it going on both tanks. Not to mention, I don't really have room to have both tanks set up at the same time. If I move the filter over without changing out the media & even siphon the water from the old tank to the new, will that help?