I'm going to put this in the Newbie forum, because I feel that it was mostly a newbie mistake. I've had a 55 gallon planted tank for about a year now. I recently decided to upgrade my HOB filter from the Tetra Whisper PF 60 that it came with to the Fluval C4. What I didn't take into account, however, was that the C4 is slightly wider than the Whisper 60. I went to hang the C4, and there wasn't enough room between my wall and the aquarium. My tank needs to be moved about half a cm away from the wall for it to fit. My aquarium with water, fish, substrate, decor, etc. is likely about 600 lbs, in addition to the base. I'm terrified to try to move it while it's full, and I'm not sure I could even do it anyway. Even if I don't tip everything over, I could put too much stress on the seals at the corner of the tank. I typically do 50% water changes on Sundays, so my question to you is if you think I should be able to move it forward 5-6 mm when it's only half full of water? I really would hate to catch all the fish, and remove all the water and decor just to get it a tiny bit, but I'll do what I need to do in order to protect my pets and my investment. Any thoughts?