Just a little info from me:- they reach around 10-12 cm, like water temoreture to be between 25-29c and will live in a PH of around 5.5-7.5. These guys come from the upper orinoco, they are worth buying as there are very few and limited exports comming out of the orinoco at the moment unless its a tanbred fish.
They are caled the blue fin panaque but arent that closly related to the genus, they have teeth much more like that of a Aufwuch feeder and should be treat more like on.
Maybe keeping the tempreture around 28c may perk him up and give him some cover
Just what i know.
Also ive found the new era sinking african cichlid pellet to be very good for plecos, got my 15" L-027 feeding on it after being in the tank for like 30 mins and my L-330 loves it aswell. The plecos in the shop go mad for it too.