I'm so sorry to see this and to read that you are going through this. It's sad. If there is anything that can be done at this point I would have to come visit to let you know. Let me know if you would like me to visit by contacting me via phone call or text to 808-345-1049. I'm available all day.
A few words about Garlic:
The major thing about feeding garlic is to find the product that works for your tank and fish. Similar to how there are different pain relievers for different people, not all garlic products work in all situations. Think about pain relievers. If you were taking one and it didn't take away the pain or it caused you to have an upset stomach, would you keep using it? In the same way we should be looking for a Garlic product that works.
How do I know if the Garlic product I am using is working?
Answer: White spots are gone in 1-2 days.
Please see this Reefkeeping Tip thread for more on the subject:
http://utahreefs.com/forum/forum_posts.asp?TID=71349Aloha