The water in my sink, in the same room that my aquarium is, is terrible...just the hot water. But I don't think it is practical to only use cold water to do a WC. I think something is up with the piping, as the hot water is cloudy as ****, plus my pipes sometimes vibrate. I was thinking on purchasing a cheap water filter from Walmart to filter the water to do water changes. Do you think that would help, or should I continue walking the flight of steps to go to the main sink to get clean water?