Is Blue Light Good For Your Fish Tank

Is Blue Light Good For Your Fish Tank? What You Need to Know About Tank Lighting.

Blue light (also called moonlight) in fish tanks has specifically been shown to bring many benefits to your fish tank. The lighting you choose for your first tank is more than just about making it look more beautiful. Lighting is essential for the overall health of our fish tank. 

Are you curious about the lights in your fish tank or aquarium? In this article, we are going to discuss what you need to know!

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Blue Lighting in Your Fish Tank

The lighting in our fish tanks plays an essential role in the aquarium’s plants and coral photosynthesis.”- Aquaticeden.com

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But what does blue light do (or surrounding blue lighting) and why does it positively affect the fish?

Types of Lighting Commonly Used in Fish Tanks

There are various colors used in fish tanks. 

Red color light, blue spectrum colors, green light, and occasionally dim white lights are used in fish tanks and are typically seen as the standards for lighting in most aquariums. 

White light and green light are known to draw fish in and are even commonly used by fishermen to lure fish to their boats.

Types of Bulbs and Lighting Fixtures

Most of your artificial light options for your fish tank or aquarium will be easily located at one of your local fish stores or pet shops. 

Artificial light options

  • Metal halides
  • Incandescent bulbs
  • Compact fluorescent bulbs
  • Regular fluorescent lights (Aquarium use bulbs)

Natural light options

  • Regular daylight during daylight hours- depending on where you live (along with your fish’s native habitat) you may need to supplement with additional light in the wintertime. 

What Does Blue Lighting Do in Your Fish Tank?

Blue lights in your fish tank are popularly called moonlights. 

They are helpful at night time so that you can see your nocturnal fish but they are not bright enough to upset the fish. 

This means that if you own a fish that only ventures out at night, then it will enjoy the blue moonlight as it will make them feel much more comfortable.

It also allows them to maintain the nocturnal environment of the fish.

“Another reason for installing a blue light in the aquarium is to copy the moonlight. That is why it is commonly called the moonlight because it illuminates the aquarium while promoting the physical activity of all the species inside. However, blue lighting does not affect the day and night cycle of the fish and the growth of algae.”- Aquatic Eden

Benefits of Using Blue LED Lights in Your Fish Tank

Seasoned aquarium owners can tell you about the importance of the type of lighting you choose. Your light output should always have a positive impact on the health of the fish. 

when to use blue light on fish tank

Having proper lighting, managing your light intensity, and keeping an eye on your bulb temperature will create an atmosphere for healthy fish. 

Other Benefits of Using the Right Color Light 

  • Using the proper aquarium-safe products and lighting will improve your aquarium fish’s metabolism and growth of the fish as well.
     
  • Blue light especially has been shown to improve the development of coral and other plant growth.
     
  • There are many different colors and types of lights you can use within the color spectrum, but not all are conducive to planted tanks or fish growth and well-being.

    Different types of fish species require different types and amounts of aquarium lighting so make sure that you thoroughly research the needs of your fish. 
  • The right lights and hours of light in your tank will help regulate and create the best night cycle for the fish in your aquarium. 
  • Blue aquarium lights do not raise the water temperature whereas other colors of light typically will raise temperatures. 
The Color of Light in Your Fish Tank and Aquatic Plants

The color of light bulbs or lighting that we choose can have more of an impact on our fish tank than we think. 

Keeping fish and live planted tanks is a science and needs to be treated as such in order to keep your aquarium healthy and functioning in harmony. 

The more you know about your fish, your plants, and their needs, the better you will be able to care for them and reap the benefits of a beautiful and well-functioning fish tank. 

Lighting Temperature

The color of lighting that is used in a fish tank or aquarium will also potentially impact the color temperature.

Luminosity in Your Fish Tank

Another important aspect to consider about fish tank lighting beyond the color is the lumination of the tank. 

You want to pick the appropriate amount for your fish species and aquarium size.

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Step 1: Consider the surface you need to illuminate. Ideally, you will want a lamp around the same length as your fish tank. 

Step 2: Consider the depth of your tank and your lighting’s ability to permeate through the depth of the water. 

This is especially important if you are planning on growing plants in or around your substrate (bottom of the tank material.)

Determining the Right Amount of Lumens

Lumination is measured in lumens per liter. Generally, most people use between 10-40 lumens per liter. 

The lower the lumination, there will be much less excessive algae growth.

But if you have a lot of live plants or plans for live aquarium plants in the near future, a higher lumination may be necessary for your fish tank.

Related Questions

What is a planted aquarium?

The term planted aquarium simply refers to an aquarium (or fish tank) that has live plants in it to benefit the fish.

Planted freshwater aquariums are becoming more and more popular as they provide many benefits.

This includes a more balanced ecosystem with the plants releasing oxygen into the water at night and also absorbing carbon dioxide.

Many fish tank enthusiasts also love the beauty that the live plants add to the tank. Some even feature the live plants more than the fish.

What are photosynthetic plants?

Photosynthetic plants such as algae are plants that use sunlight to produce organic matter. These organic compounds are actually good for your aquarium because they produce oxygen.

Should you have them in your fish tank?

Photosynthetic plants also absorb ammonia and carbon dioxide that your fish produce which is a good thing. They also provide a food source for your fish. 

Are metal halide lights safe for a fish aquarium?

Some people use metal halide lighting primarily for reef tanks or saltwater aquariums. Most aquarium experts agree that there are better choices for freshwater tanks such as LED lights.

Metal halide lights run much hotter and are more expensive than other alternative choices for lighting. Something to keep in mind.

Are LED lights the best lighting for a fish tank?

Many fish tank experts say that LED lighting is the best for an aquarium providing many benefits over more traditional fluorescent lighting.

The benefits of LED lights include better efficiency, lower cost, longer life and a wide variety of amazing color options. 

Does fish tank lighting really matter much for the health of your fish?

Yes! Fish tank lighting plays an important role in having a healthy aquarium. Just like people, fish (and plants) need light for several reasons.

This includes producing the day/night cycle of normal life, warmth, and a healthy immune system. Keeping fish in the dark would not be healthy for them and would lower their lifespan. 

It is very important to understand and know the proper lighting requirements if you are going to have a fish tank.

Many Fish Tank Enthusiasts Choose Blue Lighting

Thank you for tuning into this article today and I hope it has been helpful in answering your questions on whether blue light is helpful or harmful to fish. 

I wish you the best of luck in building and maintaining your fish tank. Have a great day and make sure to subscribe to our list to stay up to date with all of our posts and articles.

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