The unknown is what else in that build isn't reef safe? you can send this in regards to motor, there is video for the motor on youtube by blue robotics which explains the parts used for these thrusters, I have used many branded items ecotech for an example, their ATO magnet opened up in my tank without me knowing from how long, MP60 wetside magnet swelled up and separating from glass, sitting in my tank for months before I got it out and checked magnet epoxy bused etc, so nothing is reef safe now a days just my opinion,