That was from a feeding last night for the bichirs. But it ended up going into the rocks so no one got it and it came out where he was. And ok so I'll go with the 20L and try to use as much water as I can. I'll clean everything out just in case and then begin to fill it. And set it up.I'm not sure if feeding him is smart or possible right now, at least before seeing some improvement. I would throw him in the biggest tank ya got with a piece of driftwood. If you have an hob on the main tank you can throw it on there otherwise I'd use as much tank water as you can feasibly use just so he doesn't experience a nasty ph swing, or something of that nature. I'd leave it as bare as possible, one filter, one heater and one piece of driftwood. Let him brood with clean water. The good news is since you don't have to feed him he shouldn't make the water disgusting that fast. Other than these basics I'm not sure what to do other than let nature take its course.