matt5, I see your point. There is only one rain sensor port for the entire controller which controls eight zones. If I were to connect a level sensor to the rain sensor port to control my koi pond’s water level, I would be enabling one zone for level control at the expense of the remaining seven zones’ use of the rain sensor. I would either have to disable the rains sensor function for the seven zones, in order to not let the water level interfere with the irrigation zones.
Or I would have to dedicate one controller for water level control, which would be a waste since I wouldn’t be using the rest of the zones.
Or I would have to stick with my current mechanical-based water level control.