What does it mean when your tank crashes?

[tim_12]

I've seen people talk about it, but I dont really know what it means. Could someone clarify ot for me? Thanks :happy:

 

[gafish]

It means that everything and I mean everything is DRT... Dead Right There.
It basically means something went wrong (ph, nitrates) and everything dies.

 

[f1shman]

Yes. Or if you add too many fish or if you add lots of fish at the same time or over feed the ammonia can increase at a rate too fast for your filters/sand/rock to keep up with leaving lots of ammonia in the water killing everything.