like i said i offerd you to sent you my eheim pomp so you can test all you want.
my pump is runing at 30% and it's working. when i raise it to 50% the pump goes into auto off and will not respond to "go to 30%"
that will takes some time, (power off and power on will help).
i guess it was a waste of money to pre-order and buy the eheim controller.
i will go back to off/on with feeding pause
thanks for youre time.