I have a barebottom, empty glass tank, they p-bass in there still get scratches and nics. I'm 99% sure its from the glass support in the middle of the tank, they hit it when I feed them pellets.
my p.bass are still scratching easy it seems to me i don't know how sensitive they are...could my jags be beating them up they are the dominant fish in my tank...let me know what u think
