P151, you sound so much like me 10 months ago. I have learned so much since then.
Im long winded, so Ill do my best to keep this short.
the fish you got from the fair were probably not taken care of to begin with, and may have had the ick before you could actually see it.
A fish tank must be what is called "cycled" to establish good bacteria. I can tell by your post that you have tried so hard and have good entenions, just like I did before I became addicted to fish.

. Only one member here actually read all he needed to know about fish keeping before he got fish, as far as I know anyway. (I may get in trouble for saying that

)
Up in the left hand corner of this page is Articles, there you will find how to do 'cycling with fish'
Read, read and ask all the questions you want, read and read and ask even more questions. You can quickly become addicted like the rest of us.