About my black moor fish

Question
My black moor fish is not eating for two days and showing strange behaviour. He just sits in the gravel all day long without any movement.What to do now?

Answer
Neel,

 Sorry to hear your fish is ill. Have you check the water perimeters? Do you check for ammonia, Ph, nitrates and nitrites. Is your goldfish breathing harder than normal? I am thinking that you have had an ammonia spike in the water. Goldfish are one of the most delicate fish, and if their water isn't 100% healthy they will suffer. I would check the water, and if I am right and the ammonia is up, do a 25% water change. Do that daily until the ammonia is back to zero. Make sure you do water changes every week to help keep them healthy. Let me know if you have any more problems.