We are frequently asked by are readers abot fish tank lights, and how long should it be on. While there is not an exact time limit, this article will explain the importance of fish tank light and how long it should be on.

Why do you need a light in a fish tank?

There are 3 main reasons you need a fish tank light. The first is that the light provides valuable nutrients such as oxygen for your fish. Secondly, your fish tank light helps initiate photosynthesis in your fish tank. This is very important if you have live plants in your fish tank. These live plants need a light source to emulate the sun in order to go through photosynthesis and continue to grow and live. Lastly, a light in your fish tank is important for your viewing pleasure. Having an adequate light helps give your fish tank a nice glow and allows you to see your entire fish tank.

Fish tank light how long should it be on?

You should have your fish tank light on for around 10 hours a day. Most modern day fish tank lights come with automatic timers, so it should be very easy to set the period to 10 hours. 10 hours is sufficient because it allows enough light to enter your fish tank and provide nutrients for your fish and the plants. If you notice that your plants or algae are becoming overgrown, you can decrease the amount of light down to 8-9 hours. It is important that your fish has at least 12 hours without the light so it can be comfortable when it sleeps. Additionally, you don’t want to keep the light on too long because it can heat up the water too much and it will increase your electricity bill.