Johnny, if any of the trees are oaks, remove them. Oaks contain tannins which are lethal to fish. I killed an entire 2 acre pond doing that. Of course, I had some big oaks in the piles.
I will check, but I think it was all scrub brush. One or two small sapling pines. It is not that much volume in debris. Thanks for the heads up! If there is any oak, I will pull it out.
I put a large oak tree root in my aquarium that I keep tilapia in. I lost half of them before I realized they were being poisoned. It took two 90% water changes and then a long slow recovery time before they started eating again. They just sat on the bottom.
