tetra rummy nose

I know... another am i over stocked question. I dont honestly think I am, but have been told by one lfs that I am, another that i'm fine and shouls stick and another that says that i could get another 5 to 10 fish. Who is right? Anyway; I have a 64l tank (14 Gallon), with ornaments and a load...

just curious if anyone knew. I had it over 3 yrs, it only one left for a long time, it is living with female guppies as not keeping tetras anymore, seams happy enough i just wonderd if it was old for one?