In a couple days I think I'll be ready to swap out my old 29 gal and replace it with a new 33 gal long (in the same spot). I think I know what I'm doing: 33 gal has been tested for leaks - no problems there, and the background is already on. I'm using the same gravel, but adding another 20 lbs, so the new stuff will be rinsed ahead of time. I'm going to unplug the heater first so it has some time to cool down before I remove it from the tank. Then I'll drain the tank down to the last few inches, remove all (fake) plants and ornaments to make it easier to net the fish (there are 11 that will be switching tanks). They'll hang out in a 5 gal bucket until the other tank is set up (I will not feed them 24-48 hours prior and put a towel mostly over the bucket to keep it dark and hopefully they'll remain a little more calm that way. There were 2 nerites in there - both have been already moved to my 15 gal. I'll remove the old gravel, store it in a bucket, and drain the rest of water from the tank. Then I'll move the old tank and old stand, put the new stand in place, be sure it's level, put new tank on top, and add gravel to the new tank. Then I'll start working in the ornaments/fake plants and start filling with water (I always pour the water onto a plate to reduce displacement of the gravel). I'm replacing my Aqueon 55/75 (400 gph) with 2 Aqueon 30s (200 kph each). I have 2x 24 inch hoods rather than 1x 48" hood. The 55/75 has 2 filter cartridges - one will go in each of the new filters, along with little bio bags with ceramic biomax rings in each. I'll try to match the temp to 76F and put the new heater in and just let it sit in there for a bit before I plug it in. I'll probably drip acclimate the fish for a bit in the bucket just to be safe, but the pH, hardness, and temp should be the same (temp may drop a little in the bucket). I'll re-introduce the fish and leave them alone for the rest of the day with the lights off. I wanted to write this without looking at my list to see if I've got everything set in my head. Did I forget anything? Any suggestions appreciated!