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I've had a small disaster.


Ira

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About 4:30am this morning the power went out. I never would have known(Except for blinking digital clocks) except wifey got up to go to the toilet and had to go in the dark. The power was only out for about an hour and a half, I checked both tanks, they were fine, all the fish seemed happy though a bit annoyed at me for shining a flashlight in their tank. So, I went back to bed happy that the fish were doing fine. About 10 wifey comes and gets me and I look in my 200L tank, there are corpses floating everywhere. Looks like I've lost all of my cardinals, I've found 7 and a few MIA. All of my rummy noses(6 found, 1 mia), both of my lampeyes, 1 lf zebra danio, 1 serpae, one black tetra(the only one) and 1 white cloud mountain minnow. All the other fish are looking pretty stressed and floating at the surface looking very unhappy. My Brazilian Puffer is looking pretty lethargic and one of the serpaes is swimming at an angle.

I'd just changed the water yesterday, and just finished another water change just now. Ammonia is 0, nitrates maybe 10ish, PH 6.9.

I've had the power out for longer than this without any problems before, but that's the only logical cause. That maybe this time the filter went anaerobic and dumped crap into the tank when it started up. But that doesn't make sense because the last few power outages were significantly longer and there didn't seem to be any trouble at all. Also, when I checked none of the fish seemed to be gasping for air or hanging around at the surface(Except for the ones that always hang around at the surface).

So, I'm sure you can guess that I'm not in a very good mood having lost half of a tank,(Not to mention $80ish worth of fish if no more die) apparently because the damn power company thinks that power cuts every other month are ok.

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I understand you are upset Ira but please watch your language when posting. An edit would be appreciated or I will ask Pegasus to remove it.

I would not have thought a power cut that short would have that reaction. Perhaps the combination of the water change beforehand was enough to tip the balance. The tank doesn't sound overstocked - unless there are lots of still live fish you haven't mentioned.

Did you clean out the filter when you did the first water change?

Sorry about the loss of fish.

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Good to know you guys care so much to tell me off for my language before anything else.

Hamish, I'm looking at UPSes but it looks like even the cheapest is around $150 and I'd need two for both my bigger tanks. I'd like to get a couple, but it'll have to wait.:(

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Sorry to hear about the problems Ira. If you are going to look at UPS's then I'm the man to talk to. I design them at my work + we resell a pretty big range (from 600VA to 3MVA) and about $100 to $1.5M

The $150 UPS you've mentioned would probably only last 20-30 minutes. This would be ok for short power cuts, but not anything over 1-1.5 hours. It only takes 45 minutes to an hour before your filter starts to die off. After 2 hours it is pretty much dead.

My UPS holds up all my tanks for 2 days with the lights on or 3.5 days with them off. That’s thanks to the 500kg of batteries sitting under the tank inside the stand. Working where I do I got the UPS for cost and the batteries were some that weren't worth the cost of equalising so I salvaged them for me and gave 2 dozen beers for the company.

UPS's aren't really intended to hold the power up for long, just enough to shut the gear connected to them down if the cut is longer than 5-10 minutes. They get really expensive really quick if you want long holdup times.

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