swiching the lights off

[nikki]

how long can you live the fish in total darkness?

 

[EMS503]

Your lights should be on depending on what type of tank you are running,
S/W with corals or fish only, F/W with plants or fish only for 8 - 12 hours the rest of the time the lights can be off. Fish, corals & plants due run on a day and night cycle.