[canadawest]

The power head was actually moved behind the frag, but was aimed to the side of it, completely missing the frag. Previously the powerhead was in a corner creating a surface current in the direction of the frag, but again not directly at it.

I don't think it makes sense to dwell on it further. The frag is gone, but everything else is great so I'll chalk it up as "one of those things" that happens from time to time. Just another reminder that any change to the "status quo" in our ecosystems can have dire and permanent consequences.