Tangs are very sensitive to oxygen deprivation and I learned that the hard way. I lost a 9 year old sailfin once when I didn’t have any water movement for a few hours. I now only give myself 1-2 hours to get the water moving otherwise I worry that I may start losing fish.
I have a backup generator that I use once or twice a year when I have a power outage. It’s just a small generator that only has enough power to run the main pump but it is sufficient. Whenever I run the generator my wife will complain that fish have power but all of us sit in the dark.
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Mark
Current Tank Info: 450 Gallon Peninsula
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