Fish death

[Big Tank 95]

As of today my tank has been running for 15mo now all was well until 2day woke up all fish dead I'm so confused because everything was going fine so I thought anyhow I posted some pics looking to get some advice on what to do or does anyone notice anything out of the Ordinary. Not sure if you could see it in the picture the temperature is 78 degrees also the results for test were two days ago tank size 180 water change every Saturday 35 gal
The fish that died were sailfin tang, scopas tang, Bristle tooth tang. Thanks in advance

 

[ieatbugman]

what size of tank?

 

[ieatbugman]

also @vetteguy53081

 

[logibear]

When were the fish added? Anything new brought to the tank recently?

 

[TX_REEF]

.1 ammonia is certainly less than ideal, but I wouldn't think it would be deadly. is your testing equipment calibrated?

 

[vetteguy53081]

As of today my tank has been running for 15mo now all was well until 2day woke up all fish dead I'm so confused because everything was going fine so I thought anyhow I posted some pics looking to get some advice on what to do or does anyone notice anything out of the Ordinary. Not sure if you could see it in the picture the temperature is 78 degrees also the results for test were two days ago tank size 180 water change every Saturday 35 gal
The fish that died were sailfin tang, scopas tang, Bristle tooth tang. Thanks in advance

How are you testing these levels?
Ammonia is 3X the desired level.
Also, any pics of fish and tank you can provide?
Were any fish breathing heavy or stopped eating?

 

[Big Tank 95]

what size of tank?

180gal

 

[Big Tank 95]

When were the fish added? Anything new brought to the tank recently?

Nothing new in the past 4mo

 

[Big Tank 95]

.1 ammonia is certainly less than ideal, but I wouldn't think it would be deadly. is your testing equipment calibrated?

Yes it calibrated correctly weekly water changes of 35 gal also test water before changes

 

[Big Tank 95]

How are you testing these levels?
Ammonia is 3X the desired level.
Also, any pics of fish and tank you can provide?
Were any fish breathing heavy or stopped eating?

If i'm correct , that's not even 1ppm they were eating just fine when I fed them yesterday no heavy breathing or anything I could see that could have caused this That's why I posted the pictures of the tank the sump and the readings To see if someone notices something that I don't see and the salinity is 35ppt checked daily
I know ammonia is deadly at any level , but that's a very small amount for a 180 gal tank

 

[vetteguy53081]

If i'm correct , that's not even 1ppm they were eating just fine when I fed them yesterday no heavy breathing or anything I could see that could have caused this That's why I posted the pictures of the tank the sump and the readings To see if someone notices something that I don't see and the salinity is 35ppt checked daily
I know ammonia is deadly at any level , but that's a very small amount for a 180 gal tank

Ammonia, you want .025 or below

 

[RabidDragon]

for clarity, all fish died but the coral is fine?

 

[Big Tank 95]

for clarity, all fish died but the coral is fine?

All corals seem to be fine. Nothing noticeably wrong with them at this time

 

[W31Olds]

All, he has 1 fish alive and well in the video (Chromis) and that plus the other fish that died doesn't seem like a large bio load for a tank that size. Big Tank, how many hours passed before you noticed your fish had died? Jay Hemdal thought may low oxygen or velvet but wouldn't that have affected his Chromis also? I would look into external environmental factors (toxins) that may have played a role.

 

[Big Tank 95]

All, he has 1 fish alive and well in the video (Chromis) and that plus the other fish that died doesn't seem like a large bio load for a tank that size. Big Tank, how many hours passed before you noticed your fish had died? Jay Hemdal thought may low oxygen or velvet but wouldn't that have affected his Chromis also? I would look into external environmental factors (toxins) that may have played a role.

My lights are set to go off at 9:30pm
20-30 min prior I was checking on them all fine when I woke up yesterday morning two floating and one stuck to the powerhead.

 

[W31Olds]

I am not an expert on how long o2 levels have to be low for fish to start showing symptoms but if your pumps protein skimmer were on and with the fish load/180 gallon tank size you should be able to rule out low oxygen. The fish Medics could say if velvet would kill that fast and maybe why you have one fish unaffected.

 

[OrionN]

@Big Tank 95
This is very important. Did the Chromis lived through the event, or did you added him to see if the tank is OK now?
Are the three tangs are the only animals that died as far as you know? Anything else you seen that died in the tank? snails, worms or other inverts?

 

[Big Tank 95]

@Big Tank 95
This is very important. Did the Chromis lived through the event, or did you added him to see if the tank is OK now?
Are the three tangs are the only animals that died as far as you know? Anything else you seen that died in the tank? snails, worms or other inverts?

The chromis has been in the tank for 15mo all corals are fine I Don't have any inverts these were the only fish in the tank I'm confused....

 

[OrionN]

Was the power out over night?
Only the large fish died, corals and the chromis are all fine without any problem. It has to be lack of O2 due to power outage for several hours. We can rule out disease, toxin (or contamination). The only think I can think of that can kill the fish, but the one that live quickly recovered with no apparent effect is lack of Oxygen.

Can you rule out power outage over night?

 

[W31Olds]

Did you notice items in your house that needed to be reset? That would indicate the power was off. I would research velvet and if that doesn't fit suspect a toxin of some sort.