I have a 10g in my dining room right next to the pass through window. I drain the tank directly into the sink and fill from the sink. As far as chlorinated tap water going into your tank, dose the tank for 55g with dechlorinator then refill. That is the best way to fill directly from the hose. Also before you attach the hose, use the hot and cold water together to match the temp of your tank, and you can tell the temperature coming out of the faucet by running the water onto your thermometer this is how i do my upstairs tank and it works great. A little more difficult on the larger tanks though, as they are in my basement and i have to run two hoses at once (one hot, one cold)