Pick up some senkos and either weightless texas rig or wacky rig it (if you don't know how look it up on YouTube). When Texas rigging you can use anywhere from a 3/0 hook to a 6/0. For wacky rigging, you can go buy some "wacky rig hooks" or just use a small worm hook. As for their color it doesn't really matter as long as it's not too crazy. Green pumpkin and blue/black is always a go-to color for any soft plastic. 5" is a pretty solid size, you could always cut it down if the fish aren't biting on it. As for the senkos or really any bait you're using you want to target structure (fallen trees, grass/lily pads, etc). For both the wacky rig and weightless texas you should cast right next to/parallel to the structure, let it sink to the bottom, give it some twitches, repeat.
Another good pond bait is frogs or other topwaters like poppers. Target the same area as you did with the senko, but this time you could even go on top of the vegetation with the frog. Personally I like any popping frog- the Booyah Popping Pad Crasher and Spro Poppin Frog are great ones. Give it a few pops, pause; give it a few pops, pause.... Many say the frog is best in morning and at night because that is when the fishes eyes are adjusting so they just attack whatever is making commotion since they can't see it very well but honestly the frog and popper will work anytime. For frog color, any natural color (white, yellow, greenish) and black are always good, don't worry about what color it is on the top of the frog; the fish don't see that anyways.
Let me know how you do... Good luck!
