I seen a 24 inch (maybe more) irredescent shark(Pangasius hypophthalmus) at my lfs today. i never seen one so big. any way i want to get him and put him in my 135gal.(72x18x24inch) by himself. is this tank too small for him?? the previous ownner raised him from a baby in a 55gal!!! as well the price on him is $100cad(tax inc) is he over priced or is it a good deal? im not sure as i find these fish to be very common. thanks..