help with posible fungus infection

[Frenchie2]

It's pretty common for blue tangs to get "ich" from any kind of stress. Do you have a cleaner shrimp? Also, with frozen food, add some liquid garlic (Garlic Xtreme - a couple drops) along with some Selcon. As long as your tang is feeding and swims everywhere, you should not worry too much. If his immune system is strong, the "ich" will go away but it tends to come back as soon as it is stressed - that's the "down side" of owning this beautiful specimen... I also use small pellet "Bioshish" food from Dr. Bassler's (brand) which contains traces of copper and it will not harm any of your invertebres. It works really well - I feed the fish a couple times/week with this food. That was referred to me by J&L Aquatics. Good luck!