I currently have my 75G set up in the lower level of a townhouse. I'm trying to come up with a good way to refill the tank during water changes. During the warmer months I can get away with using a collapsible garden hose from outside but I still haven't found a good alternative for winter. There isn't good sink or bathroom access for buckets or pumps. The laundry room is accessible but tight. I am looking into building an arduino based temperature monitor so it automatically mixes the right amount of hot and cold water to give me the target temperature. Think it's worth installing a sink or hose connection for the interior? What techniques do you use?