Welcome to the forum. I am no expert and a southern guy so u might want someone closer to your climate but I would say the catfish over ate the size bg that the bass needed to grow. A 13/14" lmb needs bg in the 3 to 4" size range for eating. And since the catfish grew they are competing for that sized bg. If u want a catfish pond that's good but if u want a lmb pond then thin out the catfish.
I would not remove the stunted bg because when your lmb grow they will need/want the stunted bg for eating. It all depends on what you what your goals are for the pond. Balance pond is not as easy to do as it sounds, it's hard to stay balanced.
Last edited by TGW1; 05/07/20 08:09 AM.