Watching a never-ending circle of cheerful fish swim is one of the most pleasing aspects of the hobby of fishkeeping. Naturally, you could feel a little uneasy if your pet fish decides to remain stationary there at the base of your tank.
Fish may often lie at the base of the tank to relax and sleep, and this is very natural. Fish in good health will do this in between bouts of vigorous and aggressive swimming. To persuade the fish to relax, you should maintain the lighting in your tank on a daily schedule.
Apart from this, Fish will migrate to the lowest water temperature they can find if the water is improperly aerated, excessively warm, or overrun with germs that consume oxygen. Heated water rises, putting the oxygen-rich, coldest water at the tank’s bottom.
Why Is My Fish At The Bottom Of The Tank?
Fishes possess unique ways of expressing their emotions. However, we frequently fail to recognize these tiny indications.
If fish are regularly seen lying near the base of the aquarium, it is considered typical behavior. But if this is a new habit and other indicators of disease or distress accompany it, you should look into the cause.
It turns out that there are several causes for this, some beneficial and some terrible. We’ll fill you in on everything so you can determine the proper reason and act accordingly.
1. The Tank Is Overheated
In the hobby of fishkeeping, getting the water conditions just right is crucial. Fish are extremely sensitive to sudden changes in temperature. The water should be between 75 and 80 degrees Fahrenheit (24 and 27 degrees Celsius), depending on the species.
Warm water has the property of releasing oxygen much more quickly than cold water. The fish might be able to survive the heat, but they will die from a lack of oxygen very rapidly. Fish will then go to the tank’s bottom where its water is cooler and hence has more oxygen.
Additionally, a heated tank will cause your fish’s metabolism to rise, creating more waste and bacteria that produce ammonia. The oxygen in the tank will ultimately run out as a result of this.
2. The Water In The Tank Is Really Cold
Fish are as much as deadly in cold water as they are in hot water. Therefore, the significance of choosing the appropriate temperature cannot be overstated.
Fish are cold-blooded creatures, like reptiles and amphibians. They keep their body temperatures at their ideal levels by absorbing the heat from their surroundings.
The metabolism of fish is slowed by cold water. But regrettably, it also inhibits the process of taking in oxygen. The fish get worn out and sluggish as a result of these two incidents together. The fish will naturally swim to the tank’s bottom to rest there.
3. The Fish Suffers From The White Spot Illness (Ick)
The most dreaded illnesses in the hobby of fishkeeping are white spot disease, also known as ick. Ick is extremely contagious, and what’s worse is that it may spread to other fish without even needing a host.
It appears as little white spots scattered over the body and is brought on by the parasite ichthyophthirius multifiliis. The fish becomes irritated from the itch and seeks to calm itself by rubbing itself against the substrate and decorations.
4. The Fish Suffers From Swim Bladder Disease
The swim bladder serves as an earthing body part that prevents fish from plunging or floating rightward by being filled with gas, typically oxygen.
A fish with swim bladder sickness would naturally lose buoyancy and swim in odd patterns, frequently sinking toward the base of the aquarium.
A physical injury or deformity, as well as digestive issues like overeating and constipation, can all cause the swim bladder to become restricted. Even while the disease isn’t fatal, it will cause the fish great stress and weaken its immune system.
Along with skewed buoyancy, a bent back, an enlarged tummy, and appetite loss are further symptoms of swim bladder illness.
5. Your Fish Hasn’t Adjusted To Its New Surroundings
Any fish that is moved to a new habitat experiences stress. Most likely, the water’s composition differs much from that of their prior residence.
If the aquarium already has a good structure and breeding order in place, the anxiety is considerably higher. As a result, most young fish behave timidly during their first few days, hiding whenever possible and remaining by themselves.
Your fish might swim around one corner somewhere at bottom of the tank and remain in it until it feels comfortable, especially if your aquarium lacks appropriate hiding spots like caves and vegetation.
Your new fish will gradually let go of their anxiety and experience a new tank if the tankmates get along.
6. Poisoning By Ammonia
When fish excrete waste, ammonia will unavoidably be created in the tank. And you undoubtedly already know that fish cannot survive in ammonia. If it is not cured promptly, it will result in burn injuries in the gill and be lethal.
Reddish or purple gills, crimson streaks all over the abdomen, weariness, and decreased appetite are all indications of ammonia toxicity. The fish will bleed to death inside if the necessary action is not performed at the right moment.
Less than 1 ppm of ammonia is considered to be acceptable in freshwater tanks. Your fish are more susceptible to ammonia toxicity if the levels rise over this threshold. This typically occurs when a new tank is set up or when the tank is busy.
The ammonia levels in the tank must always be monitored. Increase your filtration efficiency and carry out weekly liquid adjustments to manage it. Ammonia poisoning can cause rather significant illness in fish. A sick fish will also lie at the base of the aquarium.
7. Nitrate Intoxication
The fish loses energy, becomes ill, and lies at the base of the aquarium when exposed to excessive nitrate concentrations regularly.
The byproduct of fish excrement also includes nitrate. A well-cycled aquarium will produce nitrites when ammonia is converted to it by beneficial microorganisms. After that, they will convert nitrites into nitrate.
Despite being less dangerous than nitrite and ammonia, nitrate may still cause a lot of harm. And to make matters worse, nitrate kills gradually. Lack of appetite, fading colors, fast gill motions, lethargy, and panting are common symptoms of nitrate toxicity.
8. Excessive Current
Strong currents are preferred by fish including danios, yoyo loaches, gold barbs, and rainbowfish. Meanwhile, fish like bettas, like to dwell in water with weak currents.
Strong currents might leave fish in the latter group severely exhausted. After all, moving against a strong stream continuously requires a lot of energy. As a result, they frequently repose by laying at the base of the aquarium.
9. Your Fish Is Dozing Off
It’s not always concerning to see a fish at the base of a tank. If all of the aforementioned possibilities have been checked out, the fish is probably just taking a nap. A fish seeking relaxation will frequently swim to the bottom third of the aquarium and remain there.
Watch the fish closely. The fish is simply taking a minute to unwind if its pelvic fins still are swimming slowly and it is breathing correctly.
Older fish frequently exhibit this behavior. A fish in an aquarium may live for three to five years on average. And like us, they require a lot of sleep as they near to end of their days.
Is It Concerning If The Fish Is At The Bottom of the Tank?
You should keep a close eye on any fish that suddenly begin to lay only near the base of the tank. Danger signs include symptoms including anorexia, hard breathing, sloppy swimming, or a decrease in buoyant control. In this situation, it is important to confine the fish right away and deal with the underlying issue.
Other, more concerning explanations for why a fish could be near the base of the tank include:
Attempting To Hide At The Aquarium’s Bottom
Despite usually being surface feeders or mid-level swimmers, you observe a fish preferring to lie towards the base of the aquarium.
When the fish attempts to migrate away from the bottom, keep an eye on it to see what happens. There is a tank mate compatibility problem if you are being bullied or getting poked.
Engaging In A Territorial Manner At The Base
A territorial fish could lie at the base of the aquarium to declare it as its domain, which is the opposite of the situation described above. In a defined tank that has been aquascaped to suit this common fish habit, this doesn’t happen very often.
Do you see that the base level of the aquarium is where most aggressive behavior and contests for supremacy take place? This conduct may be the result of a territorial war.
Quality Of Water Significantly Declined And Unpredictable Water Characteristics
Fluctuating water parameters and generally bad water quality in a fish tank go hand in hand. The biggest caution signs in this situation are abrupt modifications in your fish’s behavior. Most of the creatures in the tank will most likely be able to see these changes.
When the quality of water declines, tougher species of fish would just lie at the base of the aquarium. However, illness risk will be higher in more delicate fish. Fish immunity declines brought on by stress can result in:
- A fungal infection
- Bacterial illnesses
- Infestations of parasites
- Injuries from irregular swimming that was self-inflicted
How To Fix If Fish Stays At The Bottom of the Tank?
Every problem that arises in a fish tank has its own particular set of solutions. Let us take a look at each problem and its solution individually.
If The Aquarium Is Too Hot
If you believe that a hot tank is an issue, take your time before lowering the temperature. Remember that they are sensitive to temperature changes. Gradually completing this is advised. A fan or an air conditioner can be used for this. Choose an air pump to add some oxygen to the water.
Your fish may suffocate to death if the heat is not decreased and the liquid isn’t oxygenated in time. Don’t reduce the temperature using ice or ice packs. Your fish will be shocked by this, moreover, the colonies of healthy bacteria will also be destroyed.
If The Aquarium Is Too Cold
If the issue lies within cold water, you should gradually increase the temperature to prevent shocking the fish. To gradually boost the temperature, you might use a light source or an in-tank warmer. To prevent a rapid temperature increase, we advise focusing on one task at a time.
If The Fish Suffers From The White Spot Illness (Ick)
Early diagnosis and treatment of the illness are crucial. Otherwise, worms will eat every fish in your aquarium. If the temp is off, the fish is under stress, their immune systems are compromised, or they are eating the wrong things, they are more likely to get the ick.
Other symptoms of ick, in addition to white patches and itching, include heavy breathing, unusual hiding behavior, lack of appetite, and fading colors.
If you think the fish has ick, raise the water’s temperature a few degrees and treat it chemically at the same time. Based on the intensity, treat the fish for 1-2 weeks.
What To Do If Your Fish Is Sitting At The Bottom Of The Tank?
They may also be bottom seated as a result of the water, germs or parasites, stress, or digestive issues. If they are sitting at the bottom of the tank because of the water, this has to be fixed by monitoring the water every day and doing significant water adjustments till the water is in the required range.
Why Is My Fish Just Laying At The Bottom Of The Tank?
Fish will often lie at the base of the aquarium to relax and sleep, and this is very natural. Fish in good health will do this in between bouts of vigorous and aggressive swimming.
Sometimes you could see a fish resting at the base of the aquarium, but you should rule out any other possible health issues before thinking that your fish is lying at the bottom due to sleepiness.
Fish can lie at the base of the aquarium for a variety of reasons, including poor water quality, parasites, stress, GI issues, and swim bladder issues.
Is Fish Laying At The Bottom Of The Tank Still Breathing?
There is nothing to worry about. Even If your fish is just laying at the base of the aquarium, it is breathing just fine! This is typical of very basic installations. The base of the aquarium may be the safest place for your fish to rest if there are few to no hiding places.
But if you notice other unusual changes in your fish such as a new habit and other indicators of disease or distress, you might have to check for other possibilities that are aforementioned in this article.
Why Are My Fish At The Bottom Of The Tank After Cleaning?
Perhaps the nitrogen cycle within the aquarium may have been disturbed by filter cleaning and water replacement. This is because the helpful bacteria that turn ammonia into nitrites have been eliminated. Changes in the water and filters can also be upsetting.
Test the tank water’s pH, nitrate, nitrite, and ammonia levels if you possess the resources. Use conditioned water or additions that would attach dangerous substances to adjust as necessary.
Frequently Asked Questions
Why is my goldfish sitting at the bottom of the tank?
When goldfish are unwell for whatever cause, they often sit near the base of the aquarium. Fish can stay somewhere at the base of the aquarium for a variety of reasons, including poor water quality, parasites, stress, GI issues, and swim bladder issues.
Why is my fish at the bottom of the tank on its side?
Your fish may be lying on its side due to a disease called a swim bladder, a usual fish condition. Swim bladder illness is a disorder that makes it impossible for the swim bladder to function normally.