Couple hours a day, usually. My tanks are setup haphazardly in my room, so when I sit on my couch/bed (ooooh ya), if I look to my right there's a 55g tank, and to my left there's 2 5gs, 1 20long, and 1 ten gallon. Straight ahead is the TV. So every commercial, I sit and watch my fish. I've even found myself flipping my bucket over, laying a pillow ontop, and sitting there infront of my tank watching the daily going ons in my tanks. My girlfriend has 'walked in' on my fish and I quite a few times, and now it's at the point she'll just say "I'm going to go make some food, I'll leave you alone." And then come back 30 minutes later with a Pizza. Life is good.