chesterscot
Fish Herder
theres obviously gota be something goin wrong i saw in another post that you lost a lot of danios and couldnt find them
scot
scot

usually you have a 7 day returns on fish if i was you i'd pack up the dead one and the live ones if they start looking iffy and take them back to the shop and demand an exchange
i have had to do this a few times i've even frozen a dead fish so i could take it back cos i couldn't get there til the weekend- of course i phoned them first and told them i was comming back cos it sure sounds like that fish was already ill .
YOu dont seem to be having much luck with the danios maybe you should try some white clouds - even the gold or long fin variety cos they are really hardy and lots of fun to watch they are a great first fish
good luck hun
Sarah xx