He might be able to get it, but remember these guys are near blind. That's why most people feed with some kind of feeding tongs. From what I've heard, these frogs do best if given a feeding area if you want them to find the food on their own. Try to always put the food in the same spot and the frog will always search there. Some people use one of those small terracotta 'plates' as a food dish. Frogs don't forage for food so they might miss stuff lost in the gravel. You can also 'tap' train them. Tap the edge of the tank gently everytime you are about to feed, and they will associate the noise with food and therefore search for the food. Handfeeding is easier as you can monitor how much food they eat and you can make sure no food is lowering water quality. I also think it's very important to mix in some live and frozen foods occassionally. I think it will help them thrive. Pellet food is great, but nothing replaces all the goodness in what they are designed to eat!
I would feed every other day!