Pondergirl;5118422; said:I read something about driftwood and certain plecos. I can get him some tomorrow. Why does he need it and how big of a piece should I get?
Wood is only a necessity for Panaque and Cochliodon (Hypostomus cochliodon group) as these are the only plecos equipped to properly gouge on it with few, large spoon shaped teeth. Your 'chocolate pleco' is most likely a Pterygoplicthys pardalis and has small, rake like teeth, which are only good for rasping.
But having pieces of wood is a good thing to have in your pond or tank. It provides more surface for algae/biofilm to grow on, and as you've described, your pleco enjoys rasping on algae already, as this is its natural food source. it also provides hiding and resting places for the fish.