I've recently cleaned my filter manually. Now I'm seeing some green come out of the return outlets. I'd like to backwash the filter before taking it out again, but not quite sure how to go about it. I've read my filter's manual, but am having trouble identifying the following.
1. backwash line
2. changing valve positions: I only see one valve, and it looks like it's the on/off for the heater's inlet.
3. where would the backwashed water go?