PWNED!!!!
you cant force a fish to eat and shove food down its throat, its not like a human baby you can just shove a spoon of veggies into its mouth. i hope your not a dad because if you can do that to a fish i wonder what you do to a crying baby.
anyways... ive seen a 2ft regular pleco coming out of a 30g tank. as for the jar in the 90g, that must suck to be crammed in such a small tank. i bet he is so crammed he probably doesnt have enough room to kill the other fish in the tank.