My 6 year old's "Purple Pinecone" developed a growth/lesion on his head recently. I first noticed it 4 days ago. I thought it was ich so I bought Ick Guard and saw no change after two treatments. I've been doing partial water changed every 1-2 days. He also now looks swollen under his gills. Yesterday I added aquarium salt and Betta Fix. More swelling. His behavior and appetite seem normal. Opinions on what this could be?