Why is my fish hitting the glass?

Fish exhibit many behaviors that tell us how they are feeling, and glass surfing (also known as pacing) is one of them. This is when fish constantly swim up and down the sides of the aquarium glass. One reason they do this is stress. It could mean they aren't happy in their environment, for one reason or another.
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Why is my fish banging against the tank?

What it could mean: If you've noticed that your fish seems to be rubbing or banging against things in their aquarium frequently, they could be displaying what's known as “flashing,” or “itchy fish.” As the name implies, a fish that's constantly banging up against things in their aquarium could actually be trying to ...
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How can you tell if a fish is stressed?

Signs of Fish Stress

Fish suffering from a low but continuous level of stress (for example, from the wrong water conditions) will just appear “off” or “not right.” They will not be very active, won't feed well and in general will appear different from how they should be or how they used to be.
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How can I destress my fish?

Ways to Reduce Fish Stress
  1. Change water frequently to keep nitrate and ammonia levels low. ...
  2. Check water temperature for consistency regularly to prevent stressful fluctuations.
  3. Provide an optimal filtration system like the Fluval Underwater Filter that captures debris and bacteria while ensuring proper oxygenation.
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How do I know if my fish tank is 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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Why is my fish chasing the glass!? Answered!



Why is my fish coming to the surface?

Lack of oxygen in the water will cause your fish to swim to the surface to breathe; the concentration of dissolved oxygen is highest here. As soon as you notice that most of the fish are gasping for air near the surface, act immediately because this is a clear sign of distress.
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How do I increase oxygen in my fish tank?

Increasing water movement is the quickest way to increase oxygen (O2) levels in a fish tank, as it allows more O2 to dissolve and carbon dioxide (CO2) to be released. This can be easily done using an air pump, performing large water changes, manually stirring the water, or placing a fan near the aquarium.
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Why is my fish swimming around frantically?

Strange Swimming: When fish are stressed, they often develop odd swimming patterns. If your fish is swimming frantically without going anywhere, crashing at the bottom of his tank, rubbing himself on gravel or rocks, or locking his fins at his side, he may be experiencing significant stress.
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What are some signs of ammonia stress in a tank?

The signs of ammonia stress are usually pretty easy to detect, especially if you are paying attention to your fish regularly.
  • Lethargy.
  • Loss of appetite.
  • Hovering at the bottom of the tank (especially for surface dwelling fish)
  • Gasping at the surface.
  • Inflamed gills.
  • Red streaks or inflammation in the fins.
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Do fish flash for no reason?

Causes of Flashing in Freshwater Fish

The most common cause of flashing is a parasitic infestation. The most common parasites in freshwater tanks that cause flashing are monogenean trematodes (also known as flukes), and the protozoa Trichodina, Ichthyophthirius, Costia (Ichthyobodo) and Chilodonella.
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Why is my fish swimming crazy?

Fish Swimming Erratically: If your fish is swimming erratically, he could just be playing or exercising. If your fish does it this consistently and seems unhealthy, the cause may be poor water quality.
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How do you tell if a fish likes you?

Generally speaking, following are some of the ways you can tell if your fish are happy.
  1. They swim back and forth freely and energetically around the tank.
  2. Quite like humans, happy fish might have a vibrant glow to their skin. ...
  3. They do not appear fearful of the other fish in the tank. ...
  4. They are breathing normally.
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Can pet fish see you?

Can your pet fish recognize your face? A new study says, Yes, it probably can. Researchers studying archerfish found the fish can tell a familiar human face from dozens of new faces with surprising accuracy.
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Are my fish fighting or playing?

There will be visible signs if a fish has been attacked in the tank. Such signs include marks on its body and nips on its fins. A fish that is injured will shy away from the other fish to give itself time to heal. Territorial fish are likely to be aggressive toward fish of their own species that are of the same sex.
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How do you know if your fish tank has enough oxygen?

The most telling sign that your fish need more oxygen is if you see them gasping at the surface -- they will also tend to hang out back by the filter output. This area of your tank tends to possess the highest oxygen concentration as it is near the most disturbed surface.
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How do you know if your oxygen level is low in fish tank?

When oxygen is critically low, fish will gasp at the surface of the water where oxygen levels are highest. You also may notice them hanging out where the filter tumbles water back into the tank. Other signs include fast breathing, lethargic behavior or swimming off-balance.
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How do I check the oxygen level in my fish tank?

The best way to test the amount of dissolved oxygen in your aquarium's water is with a portable dissolved oxygen meter. After calibrating the meter, you can place a probe into the tank water, and read the results on the digital display.
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How can I add oxygen to my fish tank without a pump?

Ways To Oxygenate Fish Tank Without A Pump
  1. Add live aquarium plants.
  2. Use a strong filter with an adjustable flow rate.
  3. Increase water surface agitation.
  4. Increase water surface area.
  5. Keep fish that swim in different levels of the tank.
  6. Water changes/cup method (for emergency situations)
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How do I know if my fish is dying?

Loss of appetite. Weakness or listlessness. Loss of balance or buoyancy control, floating upside down, or 'sitting' on the tank floor (most fish are normally only slightly negatively-buoyant and it takes little effort to maintain position in the water column) Erratic/spiral swimming or shimmying.
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How do you increase dissolved oxygen in water?

Simple aeration or agitation can increase dissolved oxygen enough to prevent problems. Injecting air or, especially, pure oxygen can increase levels as well, but only as high as saturation levels. Paying attention to temperature can also help improve DO, as colder water can hold more oxygen.
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Is it OK to turn off aquarium light 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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How many hours should aquarium light be on?

How long should I keep my aquarium lights on? To provide animals and plants the lighting they need, 10 to 12 hours a day is sufficient. Installing a timer or purchasing a unit with integrated timing can make lighting easier––just set it and forget it. Keep in mind algae loves light as well.
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Do fish hear you?

However, yes, they can hear your voice.

They just know someone is speaking. They can associate sounds with action, though. For example, if you are to say your betta fish's name – let us call him George – each time you sprinkle food in his aquarium, he will eventually associate the sound of “George” with food.
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