How did this happen?

[Alan Russell]

I have a 220 with 2 over flow box. This morning when i got up I noticed the jets were spraying what looked like millions of tiny air bubbles. I opened the cabinet to look at the sump it was low. I opened the canopy to investigate and one of the OF boxes was over full. I went around to the side ot the tank to look what was blocking it. It was my 6" JD. His belly was stuck to the drain. Which may or may not have been a good thing. If he hadn't stopped up the drain in that box he would have died from lack of water for sure. He wasn't moving, but his mouth was so I knew he was alive. i reached in and pulled him out. When i grabbed him he got lively.
He is alive and a bit banged up from the experience. he is swimming a bit, but not much. There is blood, but none external that I can see. Looks like a giant hickey. His belly is swelled up a bit and his mouth has a gash in it.

Any thoughts on how he could have gotten over the OF box?

What should i do to ensure he lives through this?

Any treatment?

 

[nfored]

I had a 3 inch bala shark swim into and or get sucked inth a canister filter intak, this intake was 1/2 inch but had a plastic bar splitting it in half so there was only 1/4 inch open on ether side.
I woke up did my daily fish count and freaked out my fish was gone tore the tank apart, took out all the rocks every thing. It never occured to me that he could fit through a 1/4 openning, so I didn't even think to look, and just assumed he jumped out and was under then stand where I couldn't see.

A bout half hour later I decided to shut down the canister and check it out, and luckly he was in there clinging to life. He was really banged up and almost dead, but he pulled through.

http://www.monsterfishkeepers.com/forums/showthread.php?t=147558

you can see the pics there