The 240 is in the living room just to the right of my throne. I am disabled, so at home most of the time. Short answer, 3-4 hours a day. The 29 downstairs I sit and observe maybe an hour and a half a week total. I don't clean it every week. The tanks in the basement that are not setup I look at and dream..... someday......
I have 4 tanks in my living/dining room so its hard not to watch them all day. Most days theres times i just kneel in front of each tank for 30-45 min straight.