AARGH..they all died again. Shrimp still hanging in there. The feeders died overnight, the 'regular' minnows survived a day longer. I don't know what's going on, or what to do..
and as for the shrimp, I don't know what they're eating; they're not touching the fish flakes or blanched zucchini piece I put in there as far as I can tell, but they must be growing. I saw three or four had molted recently...