Firstly - What do you consider a trophy sized bass (length&weight) for your area of Indiana? Cecil Baird "The Award Winning Fish Taxidermist" and a forum member from Indiana could also help us with this information Maybe you should go to an IN state website and see what size bass they consider worthy of recognition. . The further north one goes the smaller trophy bass become. This is why national magazines like InFisherman separate the country into regions and their respective award winning fish sizes.
There has been a fair amount of discussion of raising LMbass in smaller ponds on this forum. See what posts you can collect with some searching of the Forum Headings. As I recall this has all ben discussed before under one topic or another. The main problem is some of thes topics are buried under other unrelated titles. I will also search when I get a little free time. Then when armed with a little more basic "small pond-big bass" knowledge return with some details of your unanswered questions and a couple of us northern pond owners can supply some supplimental information about larger bass in small ponds.
Secondly If you are truly interested in a quality LMbas fishery in a small pond, I would begin a crusade to remove as many of those catfish as possible. In my opinion you stocked way too many catfish in a small pond if you are primarily interested in LMbass. Catfish, as they grow larger, compete with bass for food. Each Catfish can "take-up" the food reserves of one bass. If you want to have catfish you need to realize the total bass fishery will have to share food items with the predatory cats that are present.
Also I think fair numbers of catfish will cloud up the water and make it MORE difficult for LMbass to readily and efficiently catch fish, since bass are sight feeders and certain water clarities are optimum for bass feeding. With water that is too cloudy, your bass will not grow properly and you will never realize those trophy fish. However with cloudy water you can still grow trophy catfish.
