fin discoloration

I've noticed this in both of my fish before I even get started and I don't know whether it's because they're both white fish or what, but there's something going on. Both of my Betta were white when I bought them. The first one, Yukine, I've had since Valentine's Day of this year, and the...

My betta fish has recently been very lethargic and has this white spot under his chin. I am decently sure the spot is ich so I added ick medicine into the tank along with aquarium salt. The next day (today) I noticed he is still just laying behind a rock in the tank and now his fins are starting...