Lime green stag damaged?

[Arcu2]

Just picked up this green stag along with a few other Sps frags. Dipped, took them off the original plugs and popped them onto my frag rack to acclimate them to my lights. Noticed this black spot on the top of it. Can anybody ID what it is or is it damaged? Newbie to the sticks so any help is appreciated. Linked a video as well.

https://youtube.com/shorts/2_xRh_rtLTk?feature=share

 

[Arcu2]

Here’s a better picture now that the lights are off

 

[vetteguy53081]

Just picked up this green stag along with a few other Sps frags. Dipped, took them off the original plugs and popped them onto my frag rack to acclimate them to my lights. Noticed this black spot on the top of it. Can anybody ID what it is or is it damaged? Newbie to the sticks so any help is appreciated. Linked a video as well.

https://youtube.com/shorts/2_xRh_rtLTk?feature=share

Looks like damage from scraping. Assure alk and CA are in range and flow not excessive.

Alk 8-11dkh
CA 400-440