Like the OP, I too am looking down the road at Tangs being introduced to my tank.Ask yourself why are you using the carbon, many people don’t use carbon at all and for every reason for using carbon there is probably a suitable alternative product to use.
I just employed the use of rinsed, 0.8 ROX carbon pellets in a reactor.
Tank is fallow, and completing its cycle, but water had odor, and yellow tint. Thought carbon was a good answer, but have since stumbled on this thread, and Jay's post on HLLE (lateral line), linked below.
I plan to use ozone in connection with adding a second system to existing filtration, but before then, @Reef. do you have suggestions on friendlier ways to deal with yellow water / odor given carbon concerns?
Head and Lateral Line Erosion (HLLE)
This article discusses studies performed regarding head and lateral line erosion in captive fishes. Specifically, carbon use and nutrition as they relate to this syndrome.
www.reef2reef.com