Plecos are ace, my favourite is probably L128, the Blue Phantom Plec. It has really distinct colours and pattern, only gets to about 6" and is my favourite colour - turqoise (blue/green).
My other favourite plecs in no particular order are:
- Queen Arabesque Plec (L260)
- Zebra Plec (L046)
- Big White Spot Plec (L142)
- Magnum Plec (L047)
Just remember, plecs are for life, not just for cleaning! Pic carefully, and introduce it slowly, remember some plecs are from softer waters where Discus dwell so wont do well in high pH (above 7.5)
Ben