HOw much light ??

[nolucksalts]

This maybe a dumb question but concerned I have a 55 gallon aquarium and I was wondering if I'm right or wrong at night I shut the light off in aquarium and turn back on in morning it does have a double light should I be shutting off one side or both ,just wondering is this stressful to fish or do they like complete darkness at night ---Thank You

 

[arkman]

Assuming your fish are tropical, they get about 12/12 hours in nature. I'd buy a timer and have them go on/off at regular intervals. Staging the light may not be a bad thing so maybe you should get 2 timers.

 

[nolucksalts]

no , they are salt water fish ???

 

[arkman]

sorry - yes, tropical marine (salt), rather than temprate (cold water) marine.
in the tropics (20 deg. from the equator) there is about 12 hours day, 12 hours night every day --- no long summer days...