welcome to the fishroom beeko, if you want to chat come along at 9pm most nights and join our chatroom (click on link at top of page) there is usually a group in there about then.
How long has your tank been setup, do you test the water, are you still having deaths, do you have plants, what sort of filtration do you have??
lots of questions, but its always good to find a cause for deaths in the tank
also as caryl asked, what size tank, length width and height.
mark