Like the title states, im curious to see how long it takes people to complete a water change. On my 120gal I do a 45 to 55gal wc twice a week. Typicaly I do them every sunday and wednesday and takes me roughly 45min to complete, unless theres something good on tv in which case I may stop and watch for a few min lol, so I guess I spend roughly an hour and a half a week just doing waterchanges, not including basic filter maintenance or glass cleaning or any other jazz like that. My filters I usualy clean on the first day of every month.