My lights are dead how long???

[imfsub12]

My lights are dead (or almost caught fire) how long can I go without lights

I have zoos and a hammerhead.



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[Reel North]

3 or 4 days

 

[reefteaser]

I used the "blackout" method for a cyano breakout some time ago. 3 full days, complete darkness with a blanket wrapped around the tank. Turned the lights back on slowly over 2-3 days, no harm at att (and the cyano was gone).
I would guess I could have gone longer with minimal effects.

 

[reefteaser]

That's no harm at "all" (damn that auto correct), mixed reef.

 

[organism]

You could easily go a week with no issues, during the crazy cyclone season corals can get no light for quite a bit. I've gone 2 weeks before with no problems at all.