Get one of those feeding timers. Also a vacation pellet form your LFS. They're hard, but soften up in the following days so that they wont break off easily to make a mess in your tank. Also an important thing to remember is NEVER leave a whole bunh of feeders in your tank or you'll come home to dead Ps in high nitrate tank.
I would recommend to put several feeder fish like goldfish into your tank. They will not eat all of them in a short time. I have 2 3" rbp in 85g and several goldfish and guppies in it and p's are eating one goldfish or guppy in a day.