Sorry!!!! I hope you are able to save the rest of them

Oh My God. :(

Oh Man I'm so sorry, Anything I can do just let me know.

J

That F'n sucks.....I feel for you.

Sorry man. But wtf happened:question:

Man I am so sorry to hear this horrible news. I really hope the other pull through. I feel so bad for you and the fish :cry:

What could be so toxic so quickly? When I've had massive fish die-offs it was usually coincidented with moving my ritteri, so I assumed it was shed nematocysts that caused the fish to suffocate.

Anyhow the point being that it seems to me that suffocation seems to be a likely cause for rapid onset, multiple deaths.

In this case, we're talking a few hours after adding a few rocks to a large water volume so I would guess it not to be an ammonia cycle. You mentioned there was a smell to the rocks - I wonder if it could be H2S. It would fit the profile of suffocation.

Anyhow I'm sorry if you're not ready to speculate on causes - I can only imagine what you're feeling right now - I'm so sorry. :(

Crappy - the emperor just bit the dust....... queen is still hanging on huffing and puffing away......... RIP

My initial thought was along the lines of what Tony's thinking. I know you've probably already done this, but are you aerating the %@#$ out of the water? It seems the fish most susceptible to low oxygen levels have died first.

Tony how does H2S kill? weird thing is the output of my reeflo orca skimmer into the sump is where most of the deaths occurred.