I got this Betta on Monday from a friend's friend. I have no idea how old this betta is, but when I got home today I noticed he is getting these gorgeous blue lines along his fins. Here is a picture:
Has it been there the whole time and I just never noticed it because he doesn't flare up very often? I hope this is supposed to be happening and he is not like...diseased. I'm already about to change the water. By the way, what do you guys think of Splendid Betta Water Conditioner? I just picked some up from Petco.