Powerhead Deaths

[Moogled]

Guys, powerhead deaths seem to be a problem for some reefers. My experience with SEIO powerheads has not been a positive one. For the most part, these pieces of equipment move a decent amount of power, but it's always instant death for fish that get caught in its death grip.

My fish are healthy, so I rule out "strong fish should be able to escape from powerheads".

What are some of your experiences solutions nonwithstanding?