Yeah, I have heard a few different things due to the toxins. I have also seen video's in regards to fragging them and the person doing it was wearing safty goggles also...may be a good thing to do as well once you start.
CoralPedia.com :: Articles :: Advanced Fragging Technique - The Scalpel!
Found a good page for fragging zoas
10 gallon nano reef
I expect some frags when you get to it
Ditto
And always frag them outside the tank with gloves and safety glasses on.
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I plan on using my old welding mask
Start with something you won't be devastated with if you loose it.