Hello! i've had this problem for 2 times already, the first one was a complete disaster and it ate up my male betta's flesh and killed him :(
the 2nd one I saw in my female betta just tonight, i believe it is fungus but i may be wrong. it is a cottonlike-wooly white substance just below or near the gill area.. it looks like a lot of groups as i can see circles between them.
I am sorry but i dont have a test kit :( [costs plenty to where i live]
I put her in a 1.5 gal container, i put indian almond leaf extract on her water and do often water changes.. what could be the problem so i know what to do next time?
Last time i used methylene blue and salt but i guess it was too late.. This time i still am using meth. blue + salt and keeping my fingers crossed. hope you can help me save her! Thanks!!