huge die off

thelizardkin · 03/02/2012, 06:32 PM

this was a few years back but we still haven't figured out what happened we woke up one morning to find a bunch of dead fish in my tank and the ones that were alive weren't doing well by the end of the day we lost every fish in the tank but here's the strange thing all our corals and inverts survived any idea what happened

psteeleb · 03/02/2012, 06:37 PM

that's not unusual with a sudden drop in o2

was there a power outage that night

I know someone that lost most of their fish when they turned the pump off to feed and forgot to turn it back on. When they got up in the morning most of the fish were dead or dieing

Reef264 · 03/02/2012, 06:39 PM

Yep, Oxygen is my best guess.

thelizardkin · 03/02/2012, 06:41 PM

Quote:

Originally Posted by psteeleb

that's not unusual with a sudden drop in o2

was there a power outage that night

I know someone that lost most of their fish when they turned the pump off to feed and forgot to turn it back on. When they got up in the morning most of the fish were dead or dieing

as far as I remember nothing happened that night and I remember the coral diden't look so good but that was it

jeffesaurusrex · 03/02/2012, 06:50 PM

The only other thing I can think besides low O2 levels like the above posters said is an outbreak of velvet. I've seen it take out a whole tank within about three days. A friend introduced an orange butterfly to her tank. No symptoms showed for about a week, then one morning she woke up and the butterfly was dead. A day or so later, a tang and some other fish died. Then shortly after the rest of the fish died. Velvet along with any other parasite would not affect the inverts in the tank.

Did you have any additions, possibly even as far back as a month before this happened?

Reef264 · 03/02/2012, 06:51 PM

Are there any copper valves in The system?

csmfish · 03/02/2012, 06:51 PM

Been there done that!

pryorrods · 03/02/2012, 07:23 PM

I had the same thing happen to me.......Brooklynella outbreak killed every fish in less than 2 days. The fish looked great that night before I went to bed and tangs were dead by morning and everything else was gone by the next morning. Nothing was wrong with any inverts and water parameters were perfect the whole time. The only fish I was able to save was a toadfish.

thelizardkin · 03/02/2012, 10:42 PM

I don't remember adding anything but we had a guy working on our tank back then and he was stumped also it sounds like velvet would take too long we went from 100% healthy fish to every fish dying in a 12 hour timeframe and the corals were stressed

jimmyj7090 · 03/02/2012, 11:02 PM

Sure sounds like a low O2 issue.

thelizardkin · 03/03/2012, 12:21 AM

Quote:

Originally Posted by jimmyj7090

Sure sounds like a low O2 issue.

would o2 be able to kill about 20 fish in a 400 gallon tank in 12 hours also there was both a sump and closed loop

supervdl · 03/03/2012, 12:26 AM

I had an O2 issue because of power outage and half my fish died in 7 hours. Especially if you run carbon dosing and have a lot of bacteria in the water that requires oxygen, it can happen quickly.

sanchoy · 03/03/2012, 12:44 AM

Invest in a backup pump.

thelizardkin · 03/03/2012, 01:02 AM

Quote:

Originally Posted by sanchoy

Invest in a backup pump.

this was a few years back and I did have 2 pumps the sump and the closed loop and the power did not go off

jimmyj7090 · 03/03/2012, 10:11 AM

Quote:

Originally Posted by thelizardkin

would o2 be able to kill about 20 fish in a 400 gallon tank in 12 hours also there was both a sump and closed loop

If the power went out, then yes. I see you said that the power did not go out, but are you certain? It was years ago?

Nothing else that I know of would cause a bunch of fish to suddenly die overnight like you describe except for a power outage/low O2 situation???

thelizardkin · 03/03/2012, 03:56 PM

Quote:

Originally Posted by jimmyj7090

If the power went out, then yes. I see you said that the power did not go out, but are you certain? It was years ago?

Nothing else that I know of would cause a bunch of fish to suddenly die overnight like you describe except for a power outage/low O2 situation???

they diden't die overnight most of them were still alive that morning and some were even swimming around they all died by that night and the only fish that diden't die from this was the flounder and it jumped and the power was on during the day

03/02/2012, 06:32 PM	#1
thelizardkin Registered Member Join Date: Apr 2011 Location: Portland Oregon Posts: 428	huge die off this was a few years back but we still haven't figured out what happened we woke up one morning to find a bunch of dead fish in my tank and the ones that were alive weren't doing well by the end of the day we lost every fish in the tank but here's the strange thing all our corals and inverts survived any idea what happened

03/02/2012, 06:37 PM	#2
psteeleb Registered Member Join Date: Oct 2005 Location: DFW Texas Posts: 5,249	that's not unusual with a sudden drop in o2 was there a power outage that night I know someone that lost most of their fish when they turned the pump off to feed and forgot to turn it back on. When they got up in the morning most of the fish were dead or dieing __________________ A smooth sea never made a skillful mariner Current Tank Info: 110g Mixed Reef, LED's & T5's

03/02/2012, 06:39 PM	#3
Reef264 Where's The Reef? Join Date: Oct 2011 Location: Southaven, Ms Posts: 2,098	Yep, Oxygen is my best guess. __________________ I'd rather Die on my feet, than Live on my Knees. Current Tank Info: 150g SPS Reef, 2x250w 14k Pheonix Metal Halides w/T-5 Actinics, 2 Tunze 6095's, Tunze 7096 controller, Ozone, Precision Marine Skimmer, Reef Octopus Bio-Churn Bio Pellet Reactor, GFO & Carbon Reactor, Ozone Reactor, ATO, Reef Keeper.

03/02/2012, 06:50 PM	#5
jeffesaurusrex Registered Member Join Date: Jul 2011 Location: Terre Haute, IN Posts: 322	The only other thing I can think besides low O2 levels like the above posters said is an outbreak of velvet. I've seen it take out a whole tank within about three days. A friend introduced an orange butterfly to her tank. No symptoms showed for about a week, then one morning she woke up and the butterfly was dead. A day or so later, a tang and some other fish died. Then shortly after the rest of the fish died. Velvet along with any other parasite would not affect the inverts in the tank. Did you have any additions, possibly even as far back as a month before this happened? __________________ -Jeff Current Tank Info: 29g Biocube - StevesLEDs - MP10 - Apex - Tunze

03/02/2012, 06:51 PM	#6
Reef264 Where's The Reef? Join Date: Oct 2011 Location: Southaven, Ms Posts: 2,098	Are there any copper valves in The system? __________________ I'd rather Die on my feet, than Live on my Knees. Current Tank Info: 150g SPS Reef, 2x250w 14k Pheonix Metal Halides w/T-5 Actinics, 2 Tunze 6095's, Tunze 7096 controller, Ozone, Precision Marine Skimmer, Reef Octopus Bio-Churn Bio Pellet Reactor, GFO & Carbon Reactor, Ozone Reactor, ATO, Reef Keeper.

03/02/2012, 06:51 PM	#7
csmfish Moved On Join Date: Dec 2009 Location: VA Posts: 1,055	Been there done that!

03/02/2012, 07:23 PM	#8
pryorrods Registered Member Join Date: Feb 2012 Location: Pottstown, PA Posts: 84	I had the same thing happen to me.......Brooklynella outbreak killed every fish in less than 2 days. The fish looked great that night before I went to bed and tangs were dead by morning and everything else was gone by the next morning. Nothing was wrong with any inverts and water parameters were perfect the whole time. The only fish I was able to save was a toadfish.

03/02/2012, 10:42 PM	#9
thelizardkin Registered Member Join Date: Apr 2011 Location: Portland Oregon Posts: 428	I don't remember adding anything but we had a guy working on our tank back then and he was stumped also it sounds like velvet would take too long we went from 100% healthy fish to every fish dying in a 12 hour timeframe and the corals were stressed

03/02/2012, 11:02 PM	#10
jimmyj7090 aka John K Join Date: Mar 2002 Location: Sudbury Posts: 2,367	Sure sounds like a low O2 issue. __________________ my reef ate my wallet Current Tank Info: 57G, RBTA's Zoa's and softies

03/03/2012, 12:26 AM	#12
supervdl Registered Member Join Date: Feb 2006 Location: NE PA Posts: 1,315	I had an O2 issue because of power outage and half my fish died in 7 hours. Especially if you run carbon dosing and have a lot of bacteria in the water that requires oxygen, it can happen quickly. __________________ My tank thread: http://www.reefcentral.com/forums/showthread.php?t=1167897 Current Tank Info: 135 gal mixed reef with Radions and Zeovit; 210 gal SPS reef being set up

03/03/2012, 12:44 AM	#13
sanchoy Registered Member Join Date: Jun 2009 Location: Close to the ocean Posts: 1,026	Invest in a backup pump. __________________ 250 gallon.. tangs are the best.. the po po is not. Current Tank Info: 250 reef