In my experience, the Nero 5 move a ton of water and just work. The app can be a bit funky, but that's because you have to turn location on...which doesn't make sense. If you're okay with a couple of thin cords in your tank, they're the best powerheads you can get on the market for smaller tanks. Cleaning used to be a pain, but I buy bulk food grade citric acid and clean only one at a time. If I'm feeling ultra lazy, I leave it in the solution for hours while I dilly dally around and it's a quick brush to remove everything. Taking one offline for a few hours will have 0 effects on the tank as 1 will still move plenty of water to run it effectively on. 1 Nero 5 is still 3,000 gph at 100%, which is 60x on a 50 gallon, but likely more because of rock displacement so there's no need to crank it up either.
