I recommend the Rena over the Eheim, I have both and in my opinion it is a superior unit.

Been using an Eheim dual compartment feeder for years. Works fine. I broke the hinge on the flap that raises & lowers during the feeding cycle, but that was mostly due to my own ineptitude. I think I can order a replacement, but haven't bothered.

https://tsl4pa.bl3302.livefilestore....81c.JPG?psid=1