Well, it's changed a bit in the last 36 hours but it still doesn't look like any picture or video I've seen of hydra so far. I've been more focused on my bladder snail infestation, to be honest. They're driving me batty, and it seems like every ten minutes there are more teeny tiny ones on my tank walls.
We moved the baby Mysteries to the little tank, which can't last long. Maybe another week and I'll have to buy another tank for them if we don't resolve the 29's issues. So frustrated.