My betta fish hasnt been eating for 2 weeks. He also has a white spot on his head. I initially thought it was ick so i kept the temperature at 81-83 degrees Fahrenheit and put extra salt in his tank as well as full water change every 2-4 days. I gave him food but he tries and spits it out, he sometimes eats bits and pieces but he doesnt eat like he did before. Please Help!!!!!