HELP PLEASE!!!! MY FISH ARE DYING

[Sgooosh]

update: my guppy has died

parmaters:
temp: 78
pH: 7.8
ammonia: 0
nitrite: 0
nitrate: 10

everything seems good as far as i know.

very strange.
can someone give me a summary of what has happened?

 

[Fishmanic]

very strange.
can someone give me a summary of what has happened?

Just read the entire thread.