Farewell short timer
Well, not sure it matters much now. On the advice of a fish friend expert who thought he should get the bigger tank asap, I moved him to the new tank. Which he apparently didn't like enough to try, and achieve, airborne success. He made it through a 1"x3" hole 2" up the fish tank side. He didn't make it far beyond that. I found him several feet from the tank this morning.
Really mad at myself for not listening to my gut and leaving him where he was, might have been algae or mold growing but I should have worked on that and left him in the smaller tank. He was doing physically fine otherwise.
Now I have 3 empty tanks of varying sizes mocking me.
So sorry Jasper, hope you're swimming free on the other side.