Does goldfish need light at night?

All fish should have an established day and night cycle. Fish do not have eyelids and rely on total darkness to rest. Without at least 8 hours of darkness, your goldfish can become sleep-deprived. This means you should turn off all lights before you go to bed to ensure your goldfish can rest peacefully.
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Should goldfish have a light at night?

Yes, goldfish need light and they also need nightly periods of darkness. What is this? Using lights to illuminate your tank and simulate a day / night cycle is beneficial to your goldfish, the overall health of your tank and is an important aspect of successful goldfish care.
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Can I leave my goldfish in the dark?

If your tank is in a poorly lit area – or if you want to grow live plants, such as hornwort – then it would be a good idea to include a light in your aquarium. Remember to switch off your aquarium light at night, as this will replicate natural day/night cycles. Like humans, goldfish prefer to sleep in the dark.
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Should I turn my goldfish light off at night?

Aquarium fish do not need light and it is best that you turn it off during the night. Leaving the light on can cause stress to fish as they need a period of darkness to sleep. Too much light will cause algae to rapidly grow and make your tank look dirty. So the short answer is no, do not leave your lights on.
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Do goldfish sleep better in the dark?

Goldfish don't naturally sleep at night, like people do. They do sleep better when it's dark and quiet, so many fish will sleep at night. If you make noise around a sleeping fish, it will startle awake. Thus, it's best to keep the noise level down when your fish wants to sleep.
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Do Goldfish See In The Dark? | Do Goldfish Need Light At Night? | Can Goldfish Live In The Dark?



Can goldfish sleep with light on?

Goldfish get tired just like humans do and enjoy a good night's rest. Goldfish can only sleep when the surrounding area is dark, and no lights are on over the tank or throughout the environment. This makes it important to ensure that you give your goldfish a period of darkness for several hours a day.
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Are goldfish more active at night?

Goldfish are not specifically diurnal or active during the daytime, but they are much better adapted for daytime hunting and exploring than they are for nocturnal activities. So it's natural for your pet to sleep more when the lights are off than when they're on.
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Do fish need total darkness at night?

Fish don't necessarily need complete darkness to sleep, but it's best to provide them with the amount of darkness they would have in their natural environment. They may sleep when tired if the lights are on, but it will be better for their sleep and overall health if they can rest in darkness.
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Is it OK to keep fish in the dark?

It's best to not keep your aquarium fish in the dark all the time. They need cycles of light to determine whether it's day and night. This also means that you can't keep your aquarium fish in the light all day.
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Do fish like blue light at night?

No, you should not keep a blue light or any other colored light on in your fish tank through the night. Unless you have nocturnal fish, they depend on light cycles to maintain their sleep cycle. Leaving a light on at night will disturb this cycle and result in sleep-deprived and stressed fish.
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Do goldfish like the light on or off?

Allowing your goldfish to experience more than 6 hours of darkness will have a positive effect on their health. A well-rested goldfish is healthier and more active. Aside from a period of darkness, goldfish also need moderate lighting in the day to mimic the daylight they will receive in the wild.
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How can you tell if goldfish are happy?

Your fish are happy and healthy when they:
  1. Swim actively throughout the entire tank, not just hanging out or laying at the bottom, floating near the top or hiding behind plants and ornaments.
  2. Eat regularly and swim to the surface quickly at feeding time.
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What color light is best for goldfish?

White daytime LED lights are the best choose for fancy goldfish. They last for years before fading. They are also the least likely to grow algae and bacterial blooms that could cloud the water. They are typically the most energy efficient and will cost less to power.
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Can I leave my aquarium light on 24 7?

Can I leave my aquarium light on 24/7? You should never keep your aquarium lights on for 24/7. There are are several reasons you should not do so but the most important is it will cause algae growth in your tank. And you can spend literally weeks if not months to clean out algae from your aquarium.
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How does light affect goldfish?

Having 12 hours of darkness each day not only helps your goldfish keep to a healthy wake/sleep regimen but it also helps cut back on algae growth in the tank. While you may still have some algae from time to time, too much light allows it to bloom and even take over the tank.
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Do goldfish need shade?

Because goldfish are cold-water fish, they generally should be in a pond that is shaded. If you live in a very cool area, however, direct sunlight may help maintain pond temperatures. Goldfish do not need substrate, but substrate can add to the pond's appearance and provide a good location to plant pond plants.
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Are LED lights good for fish?

Fish are not as reliant on light as plants. In general, aquarium owners can use incandescent, fluorescent, or LED lights for fish but should be aware of the heat issues that incandescent lights cause.
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Are fish Afraid of the Dark?

Fish don't like the dark because when there is no light to see, they dart around the tank, colliding with the walls, ornaments and can even become tangled in the plants. Fish need light to determine whether it is night or day, and they're scared of the sudden switch from darkness to light.
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Can fish sleep with black light?

Black lights should not be used to heat or illuminate a fish tank. Fish need aquarium lighting that's designed to provide the natural lighting they would receive in the wild. Because black lights are ultraviolet, it's only safe to use them in small doses.
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Should I turn fish light off at night?

The short answer is No – you SHOULD NOT leave the aquarium light on overnight. Fish require both light and darkness to survive. Like most other animals, fish need darkness to rest. The fact that they lack eyelids makes them require a sufficiently dark environment for them to get in any kind of sleep or rest.
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Can I cover my fish tank with a towel at night?

During winter, you should insulate your tank and all filtration by wrapping them in blankets, towels or cardboard. 1 Don't forget to cover the top of your tank, but make sure you do not cut off the oxygen supply. Resist the urge to frequently check your fish.
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How many hours of darkness do fish need?

Fish Lighting Requirements

Before determining how much light to give your fish each day, check the care requirements for your individual species, as needs vary slightly. However, most fish require around 12 hours of light a day.
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What do goldfish do all day?

First of all, it's normal to see your goldfish swim, play and explore during the day and sleep at night. Do fish sleep? Yes, but because they have no eyelids, they can't close their eyes like we do. The goldfish behavior can be influenced by the environment, tank mates and also by its owner.
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Can goldfish hear you?

Interestingly, they can listen to you. Just not in the way you think. You may have found goldfish responding to you tapping on the glass to get their attention. They can hear using several different sensory organs, mainly their internal ears and lateral line.
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Do goldfish recognize their owners?

Pet goldfish can distinguish between humans, and often recognise the human that regularly feeds them. Pet goldfish can also seem quite scared of new people, but become more comfortable with their owners over time as they realise they aren't a threat.
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