That's because Plecs love fast moving water and they like current in their tanks. He's going where the current is 
My Royal Panaques stick to the wood with their mouths right smack in front of an 850 gph powerhead and their bodies wave in the current, they love it.
My Royal Panaques stick to the wood with their mouths right smack in front of an 850 gph powerhead and their bodies wave in the current, they love it.