I just bought 2 dwarf gourami's at my lfs, my thinking was that I would get two males and not have to worry about breeding, They are in a 20G. With my 5 neon tetras that I started my tank with. Is this going to become a problem as they get older. May tank has a cluster of live plants on either end that they can hide in and open swimming in the middle, I just dont want them to kill each other off.