Fish dead after water change

[Mickie]

So I did a 20% water change, stirred up a bunch of crap in my tank and sump (I had surgery a few months back, so my tank didn't have a WC in awhile).

My fox face immediately began to breathe heavy, as did one of my anthias. My fox face today was dead, and one of my anthias doesn't look too great.

Attached are my parameters. Everything looks great, no changes.

Did I stir up a toxin?

Also, my stylophora is starting to melt after the water change.

At a lost... My fox face was much buddy [emoji29]

My other corals are fine and my other fish are fine (3 clowns, 1 anthias, orchid Dotty back, diamond watchman goby, coral beauty)

My tank is 112 gallons as a display, and the sump is roughly 30 gallons.

My inverts had an issue after the WC, but they are all fine now (peppermint shrimp, trochus snails, other snails).

 

[Mickie]

Also. TDS is 0 and the fresh saltwater was 78 degrees.

 

[Mickie]

Also, I should say that my plan is to take a shop vac and clean out my sump, WC and then redesign it to get rid of the media, go with reactors, and change up my refugium to get rid of the lr and sand.

 

[Billldg]

Did you have any dino or cyano problems, as they die off they release toxins that can get trapped in the sand and released when stirred.

 

[ihavecrabs]

I wonder if my stirring up a bunch of gunk if you didnt get a bacterial bloom that caused oxygen to deplete long enough to kill the fish.

Inverts are typically more susceptible to toxins than fish, generally speaking.

#reefsquad any thoughts?

 

[Billldg]

I wonder if my stirring up a bunch of gunk if you didnt get a bacterial bloom that caused oxygen to deplete long enough to kill the fish.

Inverts are typically more susceptible to toxins than fish, generally speaking.

#reefsquad any thoughts?

I was about to add that very thought also, had a algae bloom in a QT once and it sucked the oxygen right out of the water.

Maybe aim a pump up to stir water and oxygenate it.

 

[Venzzla]

Do you have a deep sand bed ?

 

[Mickie]

Did you have any dino or cyano problems, as they die off they release toxins that can get trapped in the sand and released when stirred.

Lol. I do/did have a cyano issue. Looks much better now, but it does make e wonder if I didn't stir up some nasties when I did that. Sigh.

 

[Mickie]

I wonder if my stirring up a bunch of gunk if you didnt get a bacterial bloom that caused oxygen to deplete long enough to kill the fish.

Inverts are typically more susceptible to toxins than fish, generally speaking.

#reefsquad any thoughts?

My water does look like I have a bacterial bloom as well. It's sorta cloudy and white.

 

[Mickie]

I was about to add that very thought also, had a algae bloom in a QT once and it sucked the oxygen right out of the water.

Maybe aim a pump up to stir water and oxygenate it.

I am now aiming my gyre at the surface for more agitation.

 

[Mickie]

Do you have a deep sand bed ?

No, it's maybe an inch and a half.

 

[Abhishek]

Do you have a deep sand bed ?

How old is the sand ? As others mentioned, oxygen depletion can be a real big problem. However, am worried about Hydrogen Sulphide being leached into the water from stirring up the sand bed which caused the depletion in oxygen .

As other said, I would immediately run air pump with wooden airstone, add fresh carbon to soak up any toxin , even start doing wet skimming , increase anything to increase oxygen content and if possible send teh water for tRiton or ATI testing immediately .

Regards,
Abhishek

 

[Mickie]

How old is the sand ? As others mentioned, oxygen depletion can be a real big problem. However, am worried about Hydrogen Sulphide being leached into the water from stirring up the sand bed which caused the depletion in oxygen .

As other said, I would immediately run air pump with wooden airstone, add fresh carbon to soak up any toxin , even start doing wet skimming , increase anything to increase oxygen content and if possible send teh water for tRiton or ATI testing immediately .

Regards,
Abhishek

This tank is an upgrade so the sand bed is about 8 months old. I'll get some more agitation and add more carbon to the tank. Thank you

 

[Big G]

However, am worried about Hydrogen Sulphide being leached into the water from stirring up the sand bed which caused the depletion in oxygen .

H2S is deadly. Sorry about your loss. :(

 

[Mickie]

H2S is deadly. Sorry about your loss. :(

Thank you. I am so bummed! Lesson learned. This is my first big "oops" In my tank. I have had the fish,rock etc for 3 years with no issues till now. Blech.

 

[dwest]

H2S is deadly. Sorry about your loss. :(

H2S is definitely bad news. I can’t imagine not smelling it though. I stirred up some back in the day of sand plenums and it stunk up the room!

 

[Mickie]

H2S is definitely bad news. I can’t imagine not smelling it though. I stirred up some back in the day of sand plenums and it stunk up the room!

I honestly don't smell a whole lot. My tank is a bit more smelly than it ever has been before, but I have definitely smelled worse lol. You have to get really close to the water to smell anything.

 

[Paso_Leo]

How old is the sand ? As others mentioned, oxygen depletion can be a real big problem. However, am worried about Hydrogen Sulphide being leached into the water from stirring up the sand bed which caused the depletion in oxygen .

As other said, I would immediately run air pump with wooden airstone, add fresh carbon to soak up any toxin , even start doing wet skimming , increase anything to increase oxygen content and if possible send teh water for tRiton or ATI testing immediately .

Regards,
Abhishek

What is wet skimming?

 

[Katrina71]

Do you happen to have an airstone too?

 

[Katrina71]

I'm sorry. :(