in spring use small grubs and small green crawdads. In summer use black baits as the water usually will cloud up with algae and in the fall use browns and reds colors of baits and larger baits as grubs born in spring get older and bigger so does the crawdads go from the young shell of green to the larger harder shell of red. I like to use black baits at night to top water baits like poppers and zara spooks will get bass to rise on them especially around a full moon. But here's the problem i'm sure. you said its a pond so the food available to the fish is very limited they become out of necessity side feeders waiting for something to eat that accidently falls into the water around the edges. you are probably walking right up to the edge to fish when you do and they can see you in their horizon and shut down the need to feed and move off to where you are not seen. Because of this the fish needs to be snuck up on. I fish city parks at dawn and I cast my rubber worm and lizards from thirty feet away from the side and bounce the bait into the dirt and then it bounces into the water. where it lands within a foot to the shore line the spray of sand and dust kicked up hits the water with the bait and the bait falls out of the clouded water into view. to the side feeders it's rib eye steak. I have caught hundreds of large mouth bass like this I wait 10 seconds after it hits bottom and then I jiggle the rod ever so slightly to give the worm a little life. that's when they take it usually after the first twitch but be patient twitch it again and again waiting twenty seconds between the twitching. last thing I can cast to five or six spots (at least six feet apart) still remaining 30 feet away then I move over forty feet to the side and do it all over again. The best of both worlds would be for you to put the wind behind you (feeders always face the wind) and the sun or moon in front of you, watch that your shadow doesn't go into the water ahead of you, it too will move off the fish.