got ethical husbandry?

Mimic Tang dying

Sad. Sympathies.

My guess is a combination.
A cyanide caught fish, not eating properly and starving, combined with elevated ammonia and possibly nitrite in quarantine tank.

Natural lava rock should be fine for fish.
It is usually avoided in reef tanks, but it is very unclear if the concerns are real, since there is little data on it.
Reefers are paranoid. :)
There is also fake lava rock out there that is painted/etc, which is bad.
 
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