i want to run a water line right to my tank so that when i do water changes i can just turn the spicket on and fill the tank back up. Usually when i when do a water change and substrate vac. I wind up draining at least half the water from that tank so does the water i refill the tank with have to be the same temp as the water in the tank? should i run both a hot water line and cold water line and get a valve that will mix the water to a given temp?
