Number of Plecos

[Panda Cory]

I have a 20 gallon tank. The species of fish in the tank are listed in my signature. Will 1 pleco be happy by itself, or should I look into getting him/her a companion? I don't want any of my fish to be unhappy.

 

[Arashi]

I have a 25 gallon tank, and only one plec in it. He seems to be doing quite fine for himself, especially since he seems to have made three new friends in my little cory cats.

I wouldn't recommend putting another plec in your 20 only because of the large size that plecs grow to. I mean you don't want more than one 10"+ size fish in your tank do ya? I know I sure wouldn't.