There is a guy on Youtube called Bamabass that has a pretty good series about building and maintaining a 5 acre pond.
He uses the PIT tags from UID, and they seem to work really well. He uses the scanner to track each fish caught and even set up sensors in the pond to monitor the bass movement utilizing the PIT tags.
But I looked at them and for the scanner, injector and tags, they run close to $3000 for everything.
A little pricey for my tastes.
I use Floy tags also and have seen similar sores on some fish. I never thought about the salt trick, thanks Sunil for that recommendation. I think I'll add a little this weekend.
I'm a tech nerd and agree Bamabass has some pretty cool technology but YouTube didn't pay me to do what he did and doesn't pay for my posts, so I'm with you, that's out of my pond budget.

I'm looking for PIT tag options as well and look forward to input from others.
Even at 2 acres, a few kitchen sized boxes of Kosher Salt would only help, and would not do any damage.
It could be enough to enable the bass to fight that infection/sore.
I second that, I will try that as well. I sent Mr. Lusk pictures and he said he doesn't see that very often but had no doubt it would heal.