My cory cat is acting odd

[Idolz]

Hey,
One of my oldest cories has been acting weird lately. I began to notice that she was having a hard time getting to the surface so I put her in my breeder box thing at the surface of the water. A day after that I let her back to the bottom to see how she would do but it was back to struggling again.... I have her in the box now and she seems to be doing ok, I don't know what to do. She is the oldest, I think that I've had her for...... almost two years. Any clue on what might be wrong
Thanks

 

[Inchworm]

Hi Idolz

I'm sorry to learn about your cory.

How are your other fish? Your water parameters? Do you keep salt in the water?
What's the temperature and has it been steady or fluctuating in this summer weather? Any sigh of finrot or spots of any kind?

The more information you can give us the better advice we can give you.

 

[Idolz]

My water temp is about 76 C, My amonia is at 0 and my ph is 7.4, i dont have any other testing kits for nitrate and nitrite , I know not to use salt on cories so there is no salt in the tank. There are no signs that i can see of any disease or infection other than how she acts, she still eats as well.