Ecotech has earned their respect, but I vote AI Neros, I have had no issues with mine and the app is very user friendly. I can’t speak badly on the mp40 though as I haven’t owned one.
Reefer 170 is similar dimensions. I tried a single MP40 and it was oversized for the tank. Currently have 2 Nero 5 running at max 60% on the back wall of a Reefer 170. I like running 2 phs versus 1 one to minimize dead spots and to have the option of more random flow. No Exp with Nero 3s.