Should I Purchase Another?

Question
I have a large tank with 3 Neon Tetras, 1 Allge Eater, a striped one that i am not sure of the exact name, 2 Red Nose Tips (I don't believe thats the exact name) 1 Blue Fin-Tail and finally 1 Pink Kissing Fish. I used to have two Pink Kissing Fish but one died, I was wondering if i should purchase another. I know some types of fish prefer to live in packs. Is this one of those types?
Thank you for your help.
~Bob

Answer
Hello. How big is this tank? I think you should wait a little while to make sure your tank conditions are perfect for introducing a new fish. Also, when I introduce a new fish I put them in a seperate tank for a few days to see if they do not have any strange quailities about them. If you have anymore questions please feel free to ask me.
Corinna