+1 on the grazer. WAY better than the clip, and the nori lasts much longer. I tried making my own, and it worked fine, it just didn't look so nice. My fish freaked a little at first also, but soon my Tang, and Wrasses took right to it. I didn't love the omega either, it just made a mess, and half of it ended up in my filter.
I started buying nori from the LFS until I saw he was just repackaging a larger bag from an Asian grocery. I bought the same amount for $2 instead of ten, and I figure I made up the cost of the grazer.