Whole tank died from stringy white poop! Any ideas what it is

[Aljohn]

hey my whole tank died from white stringy poop. The first fish to die was my dwarf angle. My dwarf angles had like a infection in side
Please see attached. Does anyone know what this is and how I could treat my tank?

 

[Humblefish]

What I see on the angel looks like a gram negative bacterial infection, or possibly uronema. The white stringy poop is caused by intestinal worms and may have been a precursor, contributing to an infection developing or uronema spreading. But intestinal worms, in and of themselves, are unlikely to cause a tank wipeout.

 

[Aljohn]

How should I treat my tank now?

 

[Humblefish]

How should I treat my tank now?

All fish are dead? Fish only or is this a reef?

 

[Aljohn]

Fish only

 

[Humblefish]

Fish only

I’d go fallow (fishless) for 6 weeks - that will kill off most diseases except one rare strain of ich (76 days fallow for that).

Unfortunately, going fallow does not eliminate uronema, but since you have no corals/inverts you can dose metro every 48 hours for 10 days: https://www.reef2reef.com/threads/metronidazole.298762/

 

[Aljohn]

Thank you

 

[Aljohn]

Wait after I dose metro and leave my tank fallow
Could I add inverts?

 

[Humblefish]

Wait after I dose metro and leave my tank fallow
Could I add inverts?

Yes, metronidazole doesn’t stay active in the water for very long.