Tank crash

[daniella3d]

could be anything.

Lack of oxygen if the tank is overcrowded

Ammonia spike

Something toxic like an anemone or a sea cucumber died or expulsed its organs.

Marine velvet (but that would not kill amphipods)

All these fish in a 25 gallons I would say lack of oxygen killed them all and then there was an ammonia spike that killed the rest. That combined with ich or maybe marine velvet.

Originally Posted by isaac1

Hi about 2 months ago when I was working out of town I got a call from my wife telling me everything was eaither dead or dieing she described it as everything was crawling out from under the rocks and dieing I lost 2 clowns a coral buety half a dozen crabs and well over a hundred amphipods but to my supprised when I came back and finally got a chance to exam the tank I noticed all my corals were fine and doing great as well as a hermit crab that hangs out on the top of my life rock ( all my corals are placed mid to high in my tank) I have no explanation for the loss water peramiters were all within range so after doing numerous water changes and battling red slime algie for the past month I decide to take a gamble and add two chromis to the tank as a test project if any one has ever had the same thing happen or any ideas or clues to what have might caused this I will appreciate all feed back