I had a trip to the pet store with purpose today- to get three more cherry barb and bring my group up to fifteen. They're in the little QT tank now, looking okay, not too stressed. A small male and two females. I was surprised how good the aquariums looked at the shop this time- I didn't see any dead fish, no ich, not even shredded fins. When I asked to get some fish the employee first said "what size is your tank?" That says a lot.
So I looked at everything else, too, in case there were any true SAEs (nope) but found a pretty little horned nerite snail. A softer, golden brown color not the bold bumblebee black-and-yellow like most I see. And a ramshorn which I got for free.