I just looked in on my Betta a couple days ago and I noticed something that disturbs and worries me. There has been a small pin-hole in the dead center of my Betta's tail since I got him 4 months ago, but other than that, he has been in perfect health. In the past 4 months, the hole hasn't gotten any bigger, or changed at all, but in the past two days, that litle pin-hole has torn from the center of the tail out to the edge. He now has a bifurcated tail. I need to know wether or not this is the onset of fin-rot. I have only seen fin-rot in the latter stages, not when it's just starting. There are no other deformities with the tail other than the split, and the tail had the little hole (a little bigger than a printed text period) for the past 4 months and it just now tore through. Sorry if I'm rambling... I love my Betta and don't want to have him get sick.