I see some like yarn out from gills, still rapid gills and gasping, white spot and some like cotton on the skins and all them is black small size 2.5 INCH, and the fins are black diaphanous …
Your fish is suffering from gill fluke and bacteria infection. Treat them with Formalin and Methylene solution.
Treatment & dosage:
- Tank water 100 liters
- Formalin 2 – 3ml Methylene solution – Dark blue
- Change water and repeat the treatment for 1 week.