I have a pair of discus but one of them always hide behind the filter and the fins are all close and look tired, and the color of the body become darker but not so dark, can you help me how to do with this problem? thankyou!
1. Change water then apply Methylene Blue solution with salt.
2. Repeat the above on the third and the fifth day.
3. If condition not improved, change to Acriflavine solution with salt.
4. Repeat third and fifth day.