My Fish Have Been In My Tank For About 2 Or 3 Weeks And Now 1 Is Diein

[daniel_2kaii9]

hey, my fish have been in my tank for about 2 or 3 weeks and now 1 is dieing each day eny1 know why ?
thanks

 

[Bobtastic]

What are your water stats? What have you tried so far?

What fish do you have in your tank, how many fish do you have and what is the size of the tank. How was it cycled?