Hey all, My new Betta (just got him last Saturday), has developed some red streaks in his tail and pectoral fins. I'm worried about the possibility of septicemia, but also thinking it just may be him coloring up more as he settles in. He is acting normally, eating well. The tank is an established one (10 gal) that has always gotten twice weekly PWC, has always tested 0,0,5-10. Last test and water change was yesterday. I just noticed the bright red streaks/lines this morning. His only tank mates are a Mystery Snail and a Nerite. I have Maracyn and Maracyn Two on hand, but hate to use them if I'm jumping the gun and panicking. In looking at the photos below, the red areas are more at the distal edges of the fins/tail. I would think with Septicemia, the redness would begin proximal, closer to the body. Looking for any opinions/advice that those of you more knowledgeable may have. Excuse the flash reflection and water spots.