powerhead inside overflow box?

[mark]

Even after nearly 5 years with dursos never really had buildup in my chambers, if was a concern could always just siphon out during water changes.

[mattdean]

Originally Posted by mark

Even after nearly 5 years with dursos never really had buildup in my chambers, if was a concern could always just siphon out during water changes.

That's what I do. Every once in a while, I'll siphon out the overflow. I have live rock in my overflow, so it's a little worse than most, and it's still not an issue.