No pics yet as the lighting is terrible, so no useful camera phone pics, and no decent camera that can set a long exposure.
The crays died and one was skeletonized (exo-skelotionized?) by something in the tank, possibly the later dead compadre committing delicous cannibalisim, but this was over a span of 5 hours between seeing happy hidey crays to dead crays. Might the leeches have something to do with it? I had a terrible dream where I found giant tank worms hiding in there.
The pump has lost a lot of efficiency, probably needs some kind of un-clogging or rinse. Any suggestions?
Either way, the pump needs to be off right now. I added a dozen pond tadpoles to the tank (caught from the actual pond), and they have some floating hairgrass fod to hide in and lots to nibble on. I throw a single pellet of outdoor fish food in every week, they all seem healthy and growing.