Thank you so much, guys!
@bannlow2471: Here are some pictures of my Pigg:
The first day I got him about a year ago:
Pigg when he was healthiest:
Pigg when he was diagnosed with severe fin rot:
Obviously he still has a long way to go, and in his recent pics he was being stubborn and wouldn't let me get a shot of his shockingly beautiful white that's regrowing, but the grey and black is lightening like crazy and I have high hopes that by the summer he could be back to normal!