So it looks like my Bristle Tooth Tang is getting HLLE on his face. I feed LRS carnivore and Sally's mysis sling with Nori 3 to 5 times a week.
I do run BRS Rox 0.8 carbon in a reactor and cleaned by running at least of gallon of tank water through it while doing water changes. It is changed out every 2 weeks.
Any suggestions of how to help him?
I do run BRS Rox 0.8 carbon in a reactor and cleaned by running at least of gallon of tank water through it while doing water changes. It is changed out every 2 weeks.
Any suggestions of how to help him?

Definitely check for stray voltage, as you seem to have the two other theories (cheap carbon & nutritional deficiency) about HLLE already covered.

