Wipeout!!

[coral papa]

What do you mean just died?

Were they okay one hour ago and dead now, or was it a longer period?

Did you do anything between the time they were okay and when they died.
Water changes? Dosing? Clean the tank? Have visitors?

We need more information.

The night before they were fine, when I woke up. The fish were just... dead, did nothing between those times

 

[coral papa]

How long have your corals been dying?

https://www.reef2reef.com/threads/brown-jelly-disease.1031861/

Just a couple weeks ago

 

[coral papa]

Uh did your boxfish release toxins? Im wondering if @EeyoreIsMySpiritAnimal just figured out the cause, if you have bad water from having no tests ans stressed that fish then that might be why they died

If the boxfish did realese its toxins, then shouldn't the inverts and the coral be dead too? Only my tube worm was stressed

 

[coral papa]

Temp, salinity, tank size, and whether or not the tank is cycled isn't too much to ask. OP provided nothing, and when probed, didn't respond. For all we know, they had an overstocked 2.5g betta cube from Petco that they added a scoop of table salt too. There's literally nothing to go on.

Temp was 30 celcius, salinity 22, tank size 40 by 49 by 40. Used sea water for the tank, it was an experiment

 

[Garf]

it was an experiment

Indeed

 

[Cell]

Temp a bit high, salinity a bit low.

If all inverts are fine, that typically rules out water quality issues, it was most likely disease.

When and what was last addition to tank?

 

[coral papa]

Temp a bit high, salinity a bit low.

If all inverts are fine, that typically rules out water quality issues, it was most likely disease.

When and what was last addition to tank?

The boxfish

 

[I never finish anythi]

Wow temp 30 degrees. I keep my tank like 25 degrees. Why you run @30 . I'm not having a go just interested to know?

 

[EeyoreIsMySpiritAnimal]

The boxfish

I think we have a winner

 

[gbroadbridge]

Wow temp 30 degrees. I keep my tank like 25 degrees. Why you run @30 . I'm not having a go just interested to know?

He's in Indonesia where that is normal room temperature.
It is a bit too hot to keeps a tank, most have some cooling system like a fan attached.

 

[coral papa]

I think we have a winner

Shouldn't the inverts die too though?

 

[AquaLogic]

Salinity, NH3/4, ORP, PH....there's a lot of tests that can lead to clues surrounding a tank crash with all inhabitants perishing.

Edit: Chlorine/Chloramine, TDS of source water, ICP testing for elevated heavy metals and contaminates. I don't really know what you were looking for with that reply. I could probably name 10 others.

Edit 2: Copper, Temperature, Biopsy of fish tissue for disease confirmation.

Edit 3: Fish MRI

Fish MRI is always my first stop when diagnosing anything. Even problems not related to my tank or aquaria in general. New problem in my life? Fish MRI.