BABY SHRIMP!!!
Tonight before I turned off the lights on my tanks, I was trying to get a count of how many were out feeding. I was able to count 20 that were swimming and feeding. While I was watching, I saw a flicker of something white in the water. I would have just thought it was debris, but it was moving against the current within the tank. Once it got my attention, I was able to find it again and confirm that it's a tiny little shrimp that looks like a comma swimming about. This got me excited, so I sat and stared for another 30 minutes without blinking in fear I'm miss another. Eventually I was able to confirm at least 3 of the dropped eggs that I've been tending have hatched and the babies are having no problem with the tank's current.
Since water flow rates was how my long story began, I've noticed that the shrimp seem to vary their routine regarding the area near the filter's return, which is the one place in the tank where there is a moderately strong movement of the water. They spend most of their day in the 3/4 of the tank where that is calm, including a few always crawling on the large sponge prefilter. In the evenings when they seem to be most active, a few of them will swim to the corner where the current is really strong. They seem to enjoy playing in the falling water. They'll swim into the stream, and then it will whip them about 6 inches away, then they swim back into the current again. After a 10 or so trips on the "water slide", they will return to the quiet areas to feed, and others will take their place playing.
The babies that I could see were climbing about on two clumps of Peacock Moss that are tied to rocks. They were easier to see in the area because the light was brightest there and not shaded by hornwort. My eyesight isn't great, but I could not see any changes yet in the plastic bag where I have the eggs that the females all dropped during shipping. There are still quite a few eggs, so I'm hoping for more babies!
Someone had asked for a picture of my shrimp, and I got my new tank light today so I could take a picture. Of the 40 I ordered, I counted 20 tonight that were out and visible. I've had 16 confirmed dead, which leaves me with 4 unknowns.
My thanks again to everyone that has given me advice, encouragement, and sympathy. Seeing the 3 fry swimming and active tonight was really encouraging that there isn't something wrong with my tank that I couldn't determine.