All fish dead tonight, help!

[electricd7]

I am taking a sample of water to my LFS this morning. I haven't done anything different, so i am not sure how/if the oxygen level would deplete this fast. Heater seems to be working properly. Maybe my test kits are bad? Should I have them test for anything in paticular besides trites, trates, and ammonia?

 

[bllfish]

I would have them test everything they can!

 

[davidryder]

<a href=showthread.php?s=&postid=9779468#post9779468 target=_blank>Originally posted</a> by bllfish
Could O2 be a problem with a skimmer running?

I seriously doubt it

 

[electricd7]

Well the local LFS (inlandaquatics.com) told me what I thought I already knew. My water quality was perfect. No problems. This makes things even worse because now I don't know what to try and prevent. The only thing I could think of to cause something like this is electrical shock or something. But then i would think it would affect the anemone, corals, clams, etc. I just can't figure this out. I turned over the rocks this afternoon and still can not find the lost tomato clown. Just not sure what to do. Do I add more fish, do I wait and see what else happens, do I move everything to a new tank....just got me baffled.

 

[andrewr]

<a href=showthread.php?s=&postid=9780429#post9780429 target=_blank>Originally posted</a> by davidryder
I seriously doubt it

When my fish nuked in my tank I had a sknmmer running on it as well. I have figured that some bacteria bloomed and either in doing so consumed all of the O2 or their death increased the CO2 and drove the pH down. That was my hypothesis on my tank

 

[bllfish]

Wow, I am stumped. Have you heard any loud snaps or clicks coming from your tank at night? I am thinking maybe some predator like a mantis?

 

[electricd7]

I hear a snap every so often and haven't figured out what it is. I haven't added any mantis, but I guess one could have hitchhiked with a coral or something. I am just going to watch things for awhile and keep my water quality up.

 

[bllfish]

I had one that came in on some live rock. Check your tank when the lights are off. That could be the culprit but to kill 4 fish it would have to be pretty big I think.