Haven't seen hide nor hair of 'em in a couple of months. My wife's cousin was told by someone at DFW Aqauatic Plant Society that they take a specialized diet. something about crab. I found the algae wafers that don't contain copper by-products after someone told me it(copper in food) was poisonous to shrimp. Either way, I don't know what happened to them.
Again, thanks for the info. I suspect nitrates/loach though he is small and there has never been a big bio-load in that tank either. So, again...I don't know.