hello to all,
First off, an apology if this has been covered which I'm sure it has.
A quick recap of my situation.
-5 Acre Pond 5'-12'deep - Southern Illinois
-Fatheads & Shiners added spring of '12'
-BG and Red Ear added spring of '13'
-150 Tiger Bass added spring of '14'
-100 Walleye added fall of '14'
-60 Northern Strained bass added spring of '16'
Goals: Big bass and lots of them, occasional bonus fish.

First couple years it was hard to catch a bass but when i did they were footballs. Last year (2017) was really the first year the bass reproduced. This year we can catch .5 lb to 1 lb LMB at will and my original bass have not increased in size over last year and some have even lost weight as i have tags in some of them and can keep track of individual fish, the regular strained bass are around 3 lbs the tigers are 4.5lbs to 5.5 lbs. The BG population is certainly lower (also i didn't feed the BG this year). The walleye are about 18"-20" and excite me every time I catch one! I feel like my bass population is starting to get away from me and I am not able to cull as much as I feel I should. So my question is... Is there a recommended species I could add to the pond to do the culling for me, but only within that smaller range of fish, as in I don't want my 3+ lb bass to get eaten as say something like a larger muskie would do. I understand there probably isn't a fish out there that will fit my needs perfectly but I didn't think it would hurt to ask opinions. Thanks!
BTW even though I haven't been on the forum much the last couple years, and even though my pond has a very mild issue of too many bass and the top end of my bass are not growing like I want. My pond is AWESOME!! And it wouldn't be anything like it is without the PB community that helped me out so much during the construction and stocking phases. So so thankful for the help! Now I live 100 yards from the pond am raising my family next to it. Endless thanks to PB!!