HELP HELP HELP SERIOUS PROBLEM!!!!!

[Nano]

k again, thanks guys.. I hate being the newb.. its so frustrating, and I'm sure most of you have been where I am at some point. I'm just glad I have the help. I am getting a refractometer today. you know to top of all my other problems, my only fish (Ocellaris Clown) has ICH. ughhh.... so I am treating him with ich attack. I use garlic rich food (new life spectrum with garlic) and he is still eating, but today I came and saw he is covered head to tail poor guy. I know this is a typical thing to say, but I just feel like giving up, I am afraid of killing everything.
the few zoos and ricordea I have are fine, and my clean up crew as well are fine. I just don't get it. lol.. I'm going nuts over here!! I mean fresh water is a breeze but this is just giving me a brain tumor.