Did all your head & taillights do this same thing? Did any other fish do this same thing?
Are the other fish all okay?
Asid from the odd behavior, are there any other symptoms, like red/ragged areas or odd discolorations or paleness?
Were the head & taillights in the tank as long as the neons and other fish? If not, which were the first to be in the tank, and how were each batch in the tank?
As for the use of all those meds... well, I don't think any of them are going to do you any good in this case, BUT you can't stop using antibiotics once you've started until the treatment is complete. If you were to stop, all the nasty badguy bacteria & fungus which survived would only give rise to new resistant strains, making for huge problems in the future.
Your fish could have any of a number of ailments, but until I know the answers to those questions I asked I can't narrow it down much.
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