I would immediately remove the other fish and go down to your local pet store and purchase melafix. Has your tank temperature fluctuated at all recently?
Behind. And yes I know I have just had a terrible day and I was gonna take them out. Its just the first thing I said when I saw them was screw it. lol I will make a new post and take some pics
and I'm actually not a new member I have been her like a year and a half but my other account got...
No because it shouldn't happen again if your careful and an educated betta keeper. (Trust me I have 8). What kind of filter do you have or do you have a filter?
And no it won't affect your tank. So don't worry about that.
Where are you purchasing your fish?
And it sounds like your fish have a bad case of fin rot. Do you have any other fish in your tank besides these neons?
So I have 6 tanks and I left on a six day trip. I brought the five smaller ones downstairs for the pet sitter to feed. I was going to put a 3 day feeder in the big one so she wouldn't have to deal with it. Well in all the commotion I forgot to put the three day feeder in the tank. I left and...