My Lion Fish is Dieing.
 

I have had him for about 2 years. He is in my 55 with a little trigger and a puffer. I tested my nitrates and amonia nitrites and ph are fine. He was stuck in some rocks trying to keep himself right side up. He is still breathing. He had not eaten in the last 4 days. Any ideas would be appreciated..

I wouldn't write it off just yet. Try using garlic to stimulate his appetite. Maybe the trigger or the puffer has been picking on him at night. Can you remove him to another tank?

I have an old 20 gallon sump I could put him in with a heater and a hang on. I have heard a lot about garlic, what type? I could coat some silver shads with it.

Either garlic extreme or Ecosystems garlic paste.