My dogface pufferfish was really all happy and playful this morning and then after he ate his strip of clam he started breathing super heavy and puffed up and is STILL puffed up....the water is 78 and I am trying to cool it. I have been changing 5 gallons every day since Saturday and now it is Monday because the water got really bad but I have really really amazing filtration in it and it is 30 gallons and I am frantic!!!!!!!!!! What should I do???