Alfredshouse is gone.....

[fkshiu]

That's a lot of livestock to add at once. The presence of nitrite indicates a cycle has occurred meaning that it could have been ammonia.

I'd still crack the FX5 open and give it a sniff.

[subman]

still just very odd to lose all the fish overnight and the corals are still alive. some more investigation is needed i think.

[alfredshouse]

The ammonia was at 0.0
Nitrate was at .8
I know it was alot of fish at once, but there were only 3 in there and I didnt expect them all to die.
I opened the FX5 and it didnt stink like rotten eggs, Checked it two weeks ago.
I did another water change tonight, I changed 50% and the KH is still high, its at 140, with a safe range of 100-125,

Im going to take my water to AA tommorow and get them to test it.

[subman]

this may be a stupid question but whats the temp? Any chance of a heater malfunction?

[alfredshouse]

Tested for voltage in the water, none was found
Did a water change on Saturday.
Please give more suggestions, Thanks

[mark]

how long has the tank been up?

[alfredshouse]

Temperature is/was at 79.6 and its been up since Feb/08.

[alfredshouse]

tested the inliner heater and digital thermometer and they are working. I put another Koralia in this weekend, thought that might of electricuted everything, but nope thats not it either.

[Black Phantom]

Your water parameters seem to be fine. At least not to the point that it would kill everything overnight. It almost sounds like you might have had a CO2 build up. Using a cannister doesn't agitate the surface so this might have been the cause.
Just trying to help narrow down the possibilities.

[Jack]

You keep saying Nitrate - which is not really toxic to fish.

If you say Nitrate (No3) being 0.8 - I think you mean Nitrite (No2) - which is very toxic.

Sorry about your loss.

It was just too many fish added at once.

Bummer.