I have a male beta. He's about 1 1/2-2 years old. Ten gallon tank, fully cycled, filtered, temperature at 78-80 degrees. I added some salt in today and already put some antibiotics in there a few days ago. I also did a 25% water change today. I changed it 50% four days ago.
My guy is swimming, etc, but he seems stressed. He's breathing heavily and tends to be lazy. But lazy I mean he'll go to a corner and brace himself in it and just sort of float there. My concern is that sometimes he tilts downwards and I'm interpreting this as a sign of being weak.
He is eating and he is swimming fine, but, I guess it's just a charge in character for him. That and the heavy breathing is concerning to me.
One thing I will note is that for about three months a few of his scales have changed color. He used to be fully red/purple, now he has little silver scales. It's not ick or any sort of fungus, but sometimes it concerns me.