ive never actually tested my water before. but with saying that i have never had a fish die in my tank(except by clocking a black molly in the head with the siphon while trying to get my water change started) oops 
and i do it every other week, bi weekly, or once every 2 weeks lol however u understand it
and i do it every other week, bi weekly, or once every 2 weeks lol however u understand it
