...And Everything is DEAD! Where do I go from here?

@lotusstar: Sorry about your tank! Keep your head above the water and I wish you all the best for the future!
 
Thanks guys for all the help! Boret, no country music, we're a rock bunch of people hehe so don't think that was an issue! HA!
Also, Otrlynn, great suggestion, I actually already have a QT set up and cycling so that way I can be ready and do this whole thing the correct way from the start. Maybe it will be a blessing to have a fresh start ya know? I will give it a couple weeks and add some inverts, if they do their job right then maybe a couple weeks from there we're start back up with a pair of clowns in QT.
 
i think the that this was caused by stress after stress after stress seeing that none of your corals have suffered as for hermits and snails hermits will prey on snails and themselves i beleive that is of no consequence the stress form moving the stress of changing the tank (sand) and new foods at different times lead to a stress induced illness that was'nt caught in time the colour change is indicative of stress the slime i'm not to sure about but you should check out www.wetwebmedia.com for more answers
 
Well, the livestock is all gone but the equipment remains.

The country is gone but the landscape remains. In a poem.

The same idea.

Pause a bit and think about it and start over again.

Sometimes ALL over again.

For a mainly fish tank, sometimes there is a possibility that a particularily virulent bacterial infection wiped out all (more likely if you never used UV effectively). In such a case, it is better to sterlize, yes, use bleach to kill ALL and start over again.

Or if you have invertebrates you can isolate them and support them with a part of the filteration medium.

Obviously, this is something not to be taken lightly. Has there even been any sign of bacterial infection at all?

It can also be that there is a oversight in inadequate gaseous exchange, simply not enough oxygen. What did you use for vigorous gaseous exchange?

Otherwise your parameters should not cause many fish to die quickly.
 
Great question about gas exchange. In the tank I have a couple tunze 6025s, I believe they pump around 650 per hour each and my return pump. That creates a fair bit of flow and also have quite a bit of surface agitation. I have an open top so have always believed my gas exchange would have been sufficient. When I make up top off water or water change it's usually used within 2 days. I hadn't run a power head or anything in the rodi water since I usually used it up so quickly I figured the aeration wod be fine. About 2 weeks ago though I dis find an extra maxijet I had and didn't realize so started running that in my rodi container just to be on the safe side.
So I don't think a lack of gas exchange would have been the problem and the fish didn't seem to have labored breathing. But I suppose it's possible? Maybe? Does it sound like I've done anything wrong with gas exchange?
 
If you have an open top tank with a lot of surface agitation, I would not think that gas exchange is the problem.
 
I am confused with the fish dying and not a change in water parameters. Or the corals staying alive. So the virulent infection makes more sense to me than anything else... plus it is the one thing you cannot test.
 
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