sometimes my pleco chases my africans around, i guess to suck on the slim coat. he even chases my catfish around too. well, the fish only put up with for about a minute then fight back (i once saw my johanni grab my pleco by the "neck" area and thrash it around like a dog would). this only seems to happen when it's feeding time. anyone else experience this? i've heard that once they get a taste for slim coat it's game over. will the pleco eventually stop trying as it matures? my one buddy has a pleco about 1 foot and it doesnt chase his africans around and this is the second pleco i've had that is doing this. any advice? he's about 3 inches long.