Actually, how much you feed them depends on how fast you want them to grow. If you prefer the natural growth rate, which is more sensible in smaller tanks, feed once a day. But for babies and eels that you want to grow quicker, you could feed once every other day or even once a day. It also depends on how much you feed it at each serving, I feed both of my eels(both small, newly added zebra and snowflake) as much as they want in one sitting, then I offer them more the next day, if they don't take it, then I leave them alone. Though once they get bigger, I will not feed them quite as frequently.
As far as the peels go, my zebra eats them with the peels and loves it, though yesterday he spit the peel up.