My Kole Tang was the most beutiful algae buster that I ever had. The trick is to make sure they have deep irredescent purple coloration. Light pink indicates cyanide caught.
This is what mine looked like.
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Currently tankless.
20 Gallon mini reef with mated pair of Maroon Clowns given to Rougiem!
80 gallon reef given to Rougiem/Wooster HS.