I got a new knife the other day. He's been hyperactive moving all around the tank. Almost to the point where he seemed distressed so I went out to the store and bought a pvc pipe for it to hide in. And still he's swimming everywhere crashing into things. When i bought him yesterday he did seem to have a small amount of fin rot and ammonia burn, but i cant tell if it got worse today. Also, he hasn't eaten anything. Made two attempts with earth worms and live blackworms (both at night with lights off). Is this normal? Any help would be great.