They aren't simply just a basic power head, while the direction is fixed they are numerous other features.
Adjustable speeds from ultra low to high flow rates, numerous program functions, reef, reef crest, waves! (Actually waves) and other programs, plus a feeding mode.
The downside they can be a little loud. But you can change that as you need. They are pricey, but they are so much more than basic power head and much more powerful. They also consume much less space inside your aquarium.
I've had mine (two mp40) for at least 3 years (maybe 4). All I've had too do is basic cleaning maintenance. I haven't had too change a part! The biggest piece of advise to prevent wet side damage is sure sure they are on center with the dry side and not vibrating, also make sure they are adjusted too the proper glass thickness.
I'm personally considering two more for my setup!
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