Triggers

A small Picaso, Huma-Huma or similar trigger & maybe a undulated would work. However I would say due to the size of your tank no other tankmates with him & they would all need something bigger in the not-so-distant future.
 
In my opinion, I wouldn't put any trigger in a 46 gallon tank. Triggers are like tangs and need their space to keep things settle.
 
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