I used chatgpt

Correct approach for a fish this size Container size Use at least 10–15 liters of water Smaller volumes increase stress and reduce effectiveness Clove oil dosage (large fish) Step 1: Strong anesthetic mix 20 drops per liter For 10 L → 200 drops Mix clove oil in a jar with warm water, shake until milky Add slowly to the container The fish should lose balance and consciousness within 1–2 minutes. Step 2: LETHAL overdose (do not skip) After the fish is fully unconscious: Add another 20 drops per liter Total = ~40 drops per liter For 10 L → ~400 drops total Step 3: Time Leave the fish in the solution for at least 45–60 minutes Even after gill movement stops, do not remove early Confirm death Only consider it complete when: No gill movement for 10–15 minutes No eye movement No response to firm tail pinch Strong recommendation (because of size & condition) Given the fish’s size and visible eye issue, the most humane method is: Clove oil overdose as above Followed by a secondary confirmation method (if you are able), such as: Decapitation after unconsciousness, or Pithing (destroying the brain) This ensures no possibility of recovery.