FYI, to set the night mode , you need to set it AT the time you want it to start. IE: if you want it to start at 10PM, you need to sit with it until 10pm and then set it up/ start it. Then set duration you want it to run.
There is a thread here with more info on night mode:
Honestly first time trying to set it up really stinks, but after you figure it out it will be like tying your shoes.....(unless you wear velcro "tie" shoes like Walt.)
you set the night mode @ the time you want it to start, it lasts 10 hours. it halfs the power you have your pumps at when you go into night mode i believe