No it did not look bad or smell bad or anything. After I lost the second fish I took my water down to the LFS and had everything tested. It tested perfect. I told them about the recent deaths, what they looked like before and after they died, and how fast they died when I noticed they were not feeling well. (Not even a whole day) They asked if I recently added anybody new to the tank or if I have recently done anything to it. (No) They asked me if I recently painted in the house or had it sprayed or anything. (No) They said it sounds like some sort of contamenation (SP). I told them I bought some fresh shrimp from the grocery store on wednesday nite and fed it to them. (I was at the lfs on friday morning) They told me that I contaimenated the tank by feeding them shrimp. I guess their was bacteria growing in the shrimp and I chopped it up and fed it to my fish. So I killed them.
The only good thing is at least I only lost 3 fish and I learned alot. I have not had any deaths or anything since that deal. (It has been about 3 months)I did a big water change and put some charcoal in the sump for a few days to absorb any thing else in the water.
Everyone else seems to not have any problems with feeding grocery store seafood. I will not ever do it again, I care too much about my fish. I felt so bad, damn, I killed them because of my own stupidity.
Hope this helps.