Something happened.... Help!

[24gnanonewbie]

My tank has been doing well... no changes for a while.

I wake up this morning to a dead shrimp... and an almost dead, white mouthed Percula, and a almost dead bi-color blenny-with the same white mouth...

What happened? I did move a few rocks around last night before I went to bed... and it looks like my LTA moved last night...

Very upset and disapointed about my fish. I did do a water change this morning... 4 gallons.

Any help would be appreciated!

*I had a bucket of water mixing for a water change, so I got some of that and put the Percula and the Bi-Color in there. Anything else I can do to try and save them?

[Sk8r]

Probably a good temp move.
Test : nitrate, ammonia, nitrite; ph; temp; salinity. Suspect water quality in any mass event: next suspect, the nem.
Possibly you disturbed a pocket of bad sand.
Hint: if you keep a log of test results and test at least every 4-5 days, you see the microchanges that lead to sudden trouble.
The fish sound chemical-burned: give them good water, 0 ammonia, and be ready with an antifungal agent and qt if they start showing signs of breathing difficulty or if there starts to be deterioration in the burned areas.