This is why all LFS
should refer people to this forum.
Sounds like a classic case of learning the hard way, eh?
Id take back all your fish and figure out a way to remove the anit-biotics completely. That stuff was meant to go into a QT tank, not the main display. It sounds like it wiped out everything in that tank.
I am surprised that the LFS
lady didnt make sure you knew what you were doing with that stuff!
But like everyone else is saying, you need to re-think that you want to keep in your tank. If it was me, id just start over. Let the tank cycle, and ask every question you can think of HERE before buying ANYTHING. Id also steer clear from that LFS
you have been going to.
I find it hilarious that the lady tested your water and decided it was perfectly fine despite the lethal levels of junk in it. :p
Make sure to ask the forum first. It saved me a lot of $$$ and heart ache!