P.S. I suspect your "dusty finish" is just it modulating color due to stress. If it come and goes, I'd bet on it.

I wish someone could really answer the question about how long Pterygoplichthys gibbiceps will live. I can say two things for certain 1) while they grow quite large, they will limit their growth to the size of the tank they are in and 2) 20+ years is certainly not unheard of. I got my ...