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Since there are no plants in my tank, do I really need to have a light on? Is it beneficial for the fish? If so, how many hours should it be on per day? I like to have my lights on a timer.
 

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fish dont need the lights they are more for you. you can keep them on as long as you want or as short as you want.
 

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One way to save some power is to cycle the lights off when you are at work, etc. A way to help fight algae is to make a dark period during the light on time. Fish will act different for a time if they are in real dark rooms but no harm done. I set my timer for no lights in the summer just to save heating the tanks.
 
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