I found Albert!

The day I posted about missing that one, I did see a kuhli nose with white barbels poking out from behind the containers that hold crypt balansae and apono capuronii- it was down in the crevice between them. I thought well if the kuhli got in there, it can get out. Didn't see it again until today, I fed thawed bloodworms and again saw the kuhli nose poke up from the gap. Then Albert swam out- looking nice and plump so even if he was stuck in there a few days, suffered no harm.