Lack of oxygen and cold was the main factor imo, this tank is at my shop which traditionally doesn't stay as warm as a house. The main issue is that at the shop there is always a day or two that it is closed and therefore not monitored. The "powerbar" is electronic which is the main culprit, had it been a cheapo push button type it all would have been ok. Instead of switching back on when the power did come on, it stayed off for some stupid reason...guess where the powerbar is now? On a more positive note it does appear that some of the corals have survived, will know more when I get home from work today,,as near as I can figure the power was out for just over 24 hours...way too long for a reef tank. I still have my 140g and I may set up the 34g at my house but for now it will stay down.
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