In the past for a 29 gal I've netted and bagged all fish and plants (I don't know how to move carpeted plants), scooped with a colander and took all the gravel (home depot bucket), especially take the filter/media and DONT replace with new, and as much water as you can transport in the large blue 5 gal water bottles you can get at the grocery/water store. Always move the glass tank empty to avoid damage.