I decided to go for a Reefmat for my IM10. The only automatic solution I could find was the corals by design roller. https://www.coralsbydesign.com/collections/noopsyche/products/aio-roller-innovative-marine-50 . It is very easy to assemble. The optical water sensor that rotates the roller is manually adjusted. It took a bit of tweaking to get it dialed in. I do shut it off if I am sticking my hand deep in the tank as the raise in water in such a small tank trigger the mat to advance. Overall I think it’s a great addition to my tank.
