I bought this one because it sounded great and it is pretty nice except that I can't get it to turn off at the time that I set. It turns on at the time that I set, it turns the "moon light" mode on and off at the times that I set, but always turns off at the default 6:30 pm. I work until 5 most days, so this means that I hardly see my fish unless I over ride it and shut it off manually when I want. Any suggestions would be appreciated.