Sudden death

[mryellowtang]

I am really sorry to hear about this; all those great fish, that's awful. Anything different about this last water change? Any chance toxins might have gotten into the tank, like someone using a cleaning product nearby or overhead? Was one fish missing before the rest? - Something rotting in a sand bed could suddenly give off hydrogen sulfide and kill everything. Agree with the comment that equipment failure is a real concern; I would tear those cannister filters down and see if anything is amiss there.

You brought up a very good concern about the rotting and hydrogen sulfide. Thank you

 

[mryellowtang]

Two canisters that hold three media type containers inside. So no way something could’ve poured in

 

[rkpetersen]

You brought up a very good concern about the rotting and hydrogen sulfide. Thank you

It happened to my neighbor across the street, less than a year ago. One morning, everything dead, 3 weeks after a wrasse went missing. Tore it down and found a blackened area in the sand.

 

[mryellowtang]

Thank you for all the help folks! Btw anyone surprised I’ve mananged to use a canister setup for this many years? I’m sadden by the lost of my fish but you live and learn.

 

[mryellowtang]

It happened to my neighbor across the street, less than a year ago. One morning, everything dead, 3 weeks after a wrasse went missing. Tore it down and found a blackened area in the sand.

. It’s actually the best point I’ve heard honestly , when things die, you gotta be quick and remove