Hey guys, I was wondering which sp. of pleco you thought is the toughest. Some things to take into account would be if one had thicker armor plating than another, and size as well. The reason I am asking is that I will be buying a pleco to possibly keep with RBP's so I would like one that will be able to handle itself in a tank full of Piranha. I will introduce the P's to the tank after him so he is the 'boss' so to speak when they are introduced, or at the same time considering I doubt ~12x 1" rbps will do much to a pleco.