what the heck is killing my fish?

Nora Pinephrine

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75 gal display, 30 gal refugium. About 5 years established.

Two clowns, a diamond goby, and a royal gamma (and now perhaps a mandarin) have all died in the last few months in my tank. No sign of trauma or illness, all deaths were sudden.

Parameters are perfect.

I have a scopa tang and a damsel who are not aggressive and don't seem to have issue with anyone. They have been surviving just fine through all of this.

I have an arrow crab and a pin cushion urchin that keep to themselves. We do have a bit of a bristle worm issue, but the arrow crab is on top of it.

It is entirely possible that any of these (except the mandarin) accidentally ran into the urchin and poked themselves but I haven't seen evidence of that. All the fish are perfectly healthy, and were fine before they died.

The only corals that I suppose could harm them would be the zoas (maybe), the devil's hand toadstool (unlikely), or a bubble coral. Maybe a rock anemone?
PXL_20221001_185459044.jpg


what the heck?? Please help if you can.
 
75 gal display, 30 gal refugium. About 5 years established.

Two clowns, a diamond goby, and a royal gamma (and now perhaps a mandarin) have all died in the last few months in my tank. No sign of trauma or illness, all deaths were sudden.

Parameters are perfect.

I have a scopa tang and a damsel who are not aggressive and don't seem to have issue with anyone. They have been surviving just fine through all of this.

I have an arrow crab and a pin cushion urchin that keep to themselves. We do have a bit of a bristle worm issue, but the arrow crab is on top of it.

It is entirely possible that any of these (except the mandarin) accidentally ran into the urchin and poked themselves but I haven't seen evidence of that. All the fish are perfectly healthy, and were fine before they died.

The only corals that I suppose could harm them would be the zoas (maybe), the devil's hand toadstool (unlikely), or a bubble coral. Maybe a rock anemone?
PXL_20221001_185459044.jpg


what the heck?? Please help if you can.

parameters, but more likely do an ICP test

try running carbon

... toadstools can emit toxins - I had one fight with an anemone and wipe out corals and couple fish died - I've banned leather corals as a result of that experience... but you don't mention other corals impacted

Sorry for your losses... sorry I don't really have any ideas
 

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