Every fish is an individual, some will be angels some will be devils. IMO i think you could aid success by keeping the fish in a quarantine tank (something you should do anyway) and feeding the little guy up, hopefully when he gets introduced after a couple of weeks he will be completely reliant on his regular feeds and the corals in the tank will be less of a temptation. I think the most damage is done by inhabitants that are introduced very soon after transport, and they are generally feeling very hungry, and will then experiment eating corals they dont recognise in the case of non obligate polyop feeders.
Pygmy angels are a crap shoot in most people's opinion. I have a coral beauty thats eats yellow sponge, but that seems to be all he bothers. I think lemon peal angels are beautiful so decide if you want to take the risk
Having kept a variety of dwarf angels, and a harem of lemon peels for almost a year..I can only tell you that you may as well get a lemon piranha. Should you be so lucky to be able to keep a lemon peel healthy (while not in a group, or a big tank) it is decidely one of the worst dwarf angels for a reef, and I will bet money on that one !
I had a lemon peel in my reef before and it was a model citizen (and I had a nice balance of powers with a potters, a coral beauty, a flame, a shepards, and a key hole living with the lemon peel).
I concur with the majority. I had one for about 3 weeks. Great coloring, but it picked at everything (polyps, zoanthids, etc.). Finally gave it away to a relative with a FO tank. It was also a pain to get him out.
My recommendation is for a coral beauty or a flame. I know neither are yellow, but if you look around, you can find them with vibrant colors.
We have one in our 220 system. He's been harmless. As with most critters if you keep them well fed they should leave corals alone. The primary diet of Lemonpeels in the wild, according to Allen & Steene, is filamentous algae. We have found them to be quite happy on a diet of PE mysis and some occasional algae.