Do you have experience with baby red eared sliders in outdoor ponds?

We have 2 baby RES's. About an inch or so long. We have had them for 3 days, and put them in our 500 gal. outdoor pond. They really haven't eaten that much at all. We take them out twice a day to feed them in a rubbermaid container. The only reason we take them out is 1. to see if they are actually eating, and 2. if we just place the food in the water, my goldfish eat it. We offered them commercial turtle food, as well as bits of squash and carrots, and a half dead minnow. We have only seen them take a nip from the commercial food. They weren't even interested in the fish. I'm wondering if we should even continue to take them out or just put the food in the water and hope they are getting something. The reason I wonder this is because I'm wondering if it's stressful for them for us to catch them and remove them from the pond. One of them stays in the water all the time. The other one climbs out on a big rock we have provided for them. I am worried that at least the one is not getting the basking time it needs, and if we should put them in the container with a basking light. Wondering if that might help the eating. I don't know. So obviously, any and all suggestions are more than welcome as we learn how to take care of these little ones.