Cprex

Ok so I vist my mothers house every now and then down in Florida, Its got a nice little pond in the back I would say its about about a mile long and wide from where I stand on her dock. I have been told Its spring fed from the middle and is about 40 feet deep at the deepest spot. It has a nice diversty of Fish from Bluegill, Carrpie, Brim,Small mouth, large mouth and a Catfish On calm days you can see All kinds of Sizes and types just swiming in the weeds and near the dock (I even say a huge large mouth oneday 12+ Pounds atleast). Anyway I have fished it alot, with little sucsuss (Im not a experinced Fisher at all but I do know the basics); I have cought out of the month or so I have spent there mabey 7-8 Bass, all around 10-16 inchs. And The only thing I have been able to catch ANYTHING on out of that pond is live Shinners, Med Size to Small. I have tried Everthing Else and cant get a bite to save my Life, Iv tryed top water frogs (which I watched bass on a clear day come right up too nip at it and then run off), Worms, jigs and Shad type lures like crawfish ect. all in the weeds and still cant get a bite on any of them. Anyway I was wondering if anyone could help me out, I really liked to fish it some other way but shinners is all that works so far. If anyone needs any more info id be glad to tell, and any tips ideas are welcome!