Do you have a species name, rather than just TSN? as I know its of the family Pseudoplatystom.
Pseudoplatystoma tigrinum is the same family which I gather is what you are calling a tig... it does look like the pics on PCF.
As for P. fasciatum I dont think it is this species, as their marking are more vertical than those on my specimen.
I'm guessing ita not a great species as I only paid £16 for it.