Ok yeah sounds good. I'll strike the idea of a pair, and think long and hard about a single one as well for that matter (tank is only 6').
There's a wee little 3" one at the LFS right now, which is what begat all this wondering on my part. The price is remarkable which is another reason (usually these things fetch 2-3 times as much). Although he ("he" .. "she" .. who knows) has not passed QT yet at the store.
Hey, quick question. Is it true that the bluechin triggers are actually bigger (max size to max size) than the crosshatches? .. Just doing some reading here and while I thought the crosshatch max size was huge at, what is it, about 12", I read that bluechins are more like 16" max size?? I guess bluechins are totally out too then, for me...