I had the same thing happen with one of my clown loaches. I eventually found him - completely dried out - behind the tank. I was amazed that he managed to jump out since the entire top of the tank is covered except for a very small opening for the filter tubes...
that sucks, but when i bought my ottos they were gone for months, i thought i lost them all but recently found one..survivor? i don't know but ended up getting trapped at the fluval intake and died
Damian Davila
"Fishes-up, chill, Plants too"
"so many plants, so little space!"