Hi! I just purchased this puffer a week ago and it is developing some kind of disease or something. I will try to post pictures but I really need help saving him. I lost a dogface puffer two weeks ago with the same type mark that developed. I have a 150 gallon tank that has been set up for 7 months. Nitrite and ammonia are at 0. Nitrate is at 40 ppm. Salinity is 1.023. Please help.