Do you have a L-number? There are many species with that common name.
I keep a number of L-number plecos with my discus, but these are in lightly stocked barebottom tanks. My plecos get a ton of food everyday and an extra feeding right before I turn the lights off. If they're living in a planted tank and have to compete for food, you might run into a problem with them sucking on the discus slime.