yep, trying to move it with the water in it can turn in to a disaster... just get a bucket and put your substrate in it and enough water to keep it all moist. put your filter media in a bucket of water as well. move your tank, put your substrate and media back in, dechlor the new water before adding it to the tank to avoid the chlorine killing any bacteria, fill it up, turn on the filter, add fish once you acclimate them properly, monitor levels and be prepared to do big water changes in the event of a mini cycle