When feeding flake food to a combination of top and middle feeders, like your danios and neons, I find that first putting out some surface flakes while my fingers are still dry, so that I can use my fingers to grind and adjust the flake sizes smaller, and then, after that, plunging my fingers into the water to release the remaining bits.. will then send flake particles downward to any of the neons who might be surface-shy, as they are sometimes.
~~waterdrop~~