I would also try the tuxedo urchin. The only problem I had with mine was his habit of taking loose frags for "piggyback rides" and dropping them off on the wrong side of town. It was cute for a while, but I got sick of retrieving the poor guys when he would deposit them behind the rock structure or perilously close to another coral. It shouldn't be as much of a hassle in a ten though. 'Course, they poop like crazy! That might be bad in a ten. With my limited hobby experience, I won't say anything except that I respect the opinions of the "tang police" as being more than just opinions, due to their undoubted magnitude of experience and information uptake in the area of tang husbandry and general reef tank care, so I agree based on everything that's been thrown on the table so far, that employing a tang of any description would be not only in bad taste but also just not all that effective. No amount of verbal rebuke on this forum will stop you from doing it if you really want to, and it's ultimately your decision, but consider the "tang police's" words, because it's my firm conviction that while a tiny sample of them may have just jumped on the bandwagon to take up a cause for their own reasons, almost all of them express their reservations not for the detriment of others, but for the sake of your success and mine, and the well-being of the tangs in question. It's ultimately your decision my friend, and while I too am guilty of breaking a few "rules" of the trade now and then, I take advice where I can get it and give my more experienced fellow hobbyists the benefit of the doubt when they offer criticizm, regardless of how it may inconvenience me, and if I'm dead set on trying something anyway, it's never going to be at the expense of a hapless organism if I can avoid it. Ignorant mistakes are tolerable and happen to all of us, but if you refuse the warnings of others you take full responsibility for your success or failure, and the animals in your charge pay the ultimate price for your failure. I'm not an animal rights activist, but I do feel responsible for organisms that I assume care of. Since your corals are in peril, it sounds like you have to compromise something, and here's where I WILL give an opinion that may not be well recieved by some. To me corals, while difinetely being organisms, and technically being animals, are in most cases, for all practical purposes, plants. I say that to make this point, it's feasible to preserve a coral colony by fragging it, albiet at the expense of some of the polyps, and I don't feel that guilty about disposing of exess xenia cuttings or neglecting to retrieve a wayward zoanthid that gets killed by light deprivation because there seems to be a considerable difference between a coral polyp and a fish in regards to their "life". That may not make much sense, but let's just say that to me removing every possible coral to a safe place and leaving a few remnants to the mercy of the algae is much more "humane" and ultimately makes more sense financially than risking the life of a fish, because the saved coral frags will regenerate, given enough time, beyond their current size and value but a fish is gone once it's gone. I guess that was too long winded, sorry, and I do hope you will make a decision that you won't regret.
And don't kill the messenger if they bear an unwanted message, as is the case often in this hobby, and don't take insults to personally, they'll hurt worse if you let them than if you don't.
Happy reefing
