The symptoms are weight loss and hiding, then they die. They can look fine and then be gone within 24-48 hours. They also tend to have ragged fins, as if the other guppies are picking on them more.
The only thing I can think is just old age. I know guppies can live up to 3 years or longer, but it seems like I've read pet store quality guppies tend to be inbred and weaker. My guppies were probably about a year or a little less.
Any thoughts? I'm down to four and don't plan to add any more guppies once they are gone, but I'd like to do my best for those remaining if it is something treatable.
As a side note, the other fish in the tank (cories and rasboras) are fine- I haven't lost any of them or had problems.
Edited by trianglekitty, 12 September 2011 - 10:11 PM.