I know this is an old thread but just wanted to comment on my Christmas present. The Ecodrift 4.1. I just got it set up and i love it. The instructions for the controller are terrible so you have to youtube it. The other ridiculous thing is the 4.1 contoller comes with a light sensor connection that senses when your tank light goes off and it puts the pump into continuous, low flow. After i mounted the controller in my cabinet, I see this little capacitor looking thing in the box. Not knowing what it was i threw it back in the box and proceeded to research how to purchase the light sensor and cord. I found it on AquaMedics sight and low and behold, it was the same thing i threw back in the box. Just without the cord. Seeing that the sensor wires that plug into the controller were roughly .26 gauge, i soldered some cat 5 wire to the sensor and plugged it in, ran the sensor up the back of the tank and taped it to the rim and boom, worked like a charm!! All worth it for the price vs. an MP10+Controller.