Why do the weird things happen to my tank...

[Rogue951]

So I woke up at around 4am to hear my return pump running dry and my display tank filled to the brim. (But not overflowing, whew...)

Return pipe was clogged by SOMETHING.... I have a center tank overflow with a single outlet drilled halfway down the tank. I bought this 40g breeder like this years ago. Would do it differently if I could.

Anyway, I fed a piece of tubing up from the bottom and figured out the clog was somewhere behind the tank.

I poorly threw this together back then not thinking I'd ever need to access it.
So I had to take a red hot drill bit (flame heated) and slowly burn a hole into the top of my durso style pipe to make some kind of access.
Stuck an inspection camera down the hole and what do I see?




Somehow he managed to climb the overflow, over the teeth, up the durso pipe, into the opening, make the U turn and fall down the pipe.

Someone please explain what posessed this hermit to do so????

So next question.... how do I get him out...