my puffer fish

Question
I have a spotted green pufferfish and he wont swill aroung he just sits at the top of the tank and does nothing can you tell us what is wrong with him??

Answer
Dakota,                                                                Your puffer is brackish and as they reach adult hood they need salt in the water. You can try regular aquarium salt.Cheap 1 tblsp er 5 gallons. If that doesn't work..I don't know what is in there with his , but brackish is 1/3 cup per gallon of sea salt. Good Luck,Tina