Please forgive me for joining this discussion but...
It seems to me that we have paradox here.... Sort of.....
So, fish jumped out, thanx to quick reaction, he (or she) was back in water immediately.
Then, fish starts to breath heavy, and obvious reason is not a fact that fish just slammed on hard floor from height, and since we all know that floors are not very suitable place for fish, no, lets test water to see parameters, who probably dont have anything with fact that fish jumped out.
More, lets put some more stress to fish by moving her (or him) to another tank.
Then, lets notice some crabs that move slowly.... As we all know, crabs love to pull The Flash all the time, speeding trough tank 24/7.... So, lets remove them also. While we are here, lets make water change, ignoring fact that all tested parameters are good.
Jesus, if my crabs didnt move from one place in days, then i will check them, crab that is moving slowly is nothing that worries me. Crab that like to walk on my tank braces also falls into that - dont worry me.
Then, corals look bit stressed after wc.... Totaly normal. It can be salt, maybe you miss ph, temp was different, alk.... Or maybe nothing. Then, even if corals dont look happy, lets make two more 90% changes.....
I think u see where i'm going with this
Possible tank crash was consequence, not cause....
There is sooo many things one can do before it starts to panick and pull things out if tank, doing massive water changes....
And i apologize, but, didn's see that you do at least one of them....
But, good luck.