How To Quarantine New Fish? (Step by Step Guide)

When you get a new fish, the first thing you should do is quarantine it. This means putting it in a separate tank from your other fish for a period of time to make sure it’s not sick.

You’ll need to set up the quarantine tank before you get the new fish, and it needs to be large enough for the fish to swim around in. You’ll also need to stock it with appropriate water conditions and food.

During the quarantine period, watch your new fish closely for signs of illness. If it looks sick, take it to a veterinarian who specializes in fish. If the fish is healthy at the end of the quarantine period, you can add it to your tank. But be sure to keep an eye on it for any signs of illness, and if any develop, isolate the fish again.

What is Fish Quarantine

Quarantine is the process of isolating a new fish from your main tank for a set period of time to check for any diseases or parasites that the fish may have.

When you add new fish to your aquarium, you should always quarantine them first. This will help protect your other fish from disease.

You will also need to set up a hospital tank. The hospital tank can be used to treat sick fish, and it should also have a filter and heater.

How Long To Quarantine Fish

The recommended length of quarantine time varies depending on fish species, but most people recommend at least two weeks. During this time, you should observe the new fish for any signs of illness and monitor its behavior and eating habits.

If everything seems normal after two weeks, then you can safely add the fish to your main tank.

Related: How To Quarantine Sick Fish?

Related: How To Quarantine Saltwater Fish?

How to Quarantine Aquarium Fish (Steps by Step)

When you bring home a new fish, it’s important to quarantine it in order to prevent the spread of disease. Before exposing the fish to other fish, they must be quarantined.

Here are the steps to quarantine a new fish:

Step 1) Put the new fish in a separate tank from your other fish

When you get a new fish, it’s important to quarantine it in a separate tank from your other fish. This will help prevent the spread of disease and will give the new fish time to adjust to its new environment.

The quarantine tank should be small and easy to clean. You’ll need a heater, filter, and some water conditioner. The water temperature should be around 78 degrees Fahrenheit, and the pH should be around 7.0.

If you’re not sure how to set up a quarantine tank, ask your pet store for advice. They can usually recommend a good product for this purpose.

Step 2) Add water conditioner to the tank

When you add a new fish to your aquarium, you should always quarantine it in a separate tank for a period of two to three weeks. During this time, you should add a water conditioner to the tank to help keep the water healthy.

The conditioner will help remove chlorine and heavy metals from the water and will also help to neutralize any harmful bacteria.

Step 3) Add a small amount of food to the tank

During the quarantine period, you should add a small amount of food to the tank each day. This will help the fish to stay healthy and build up their immunity.

Step 4) Observe the new fish for signs of illness or stress

When you bring a new fish into your aquarium, it is important to quarantine it in order to observe it for signs of illness or stress. During the quarantine period, you should watch the new fish closely for any signs of problems.

If you notice any abnormalities, you can take steps to treat the fish and prevent the spread of illness to the rest of your aquarium.

One thing to look for during the quarantine period is stress. Signs of stress can include erratic swimming, gasping at the surface of the water, and color changes. If you see any of these signs, take steps to reduce the stress levels of the new fish.

You can do this by adding decorations to create hiding places, adding plants to provide shelter, and keeping the water temperature consistent.

Step 5) Release or Treat the Quarantine Fish

If the new fish appears healthy, release it into your main tank. If the new fish appears sick, treat it with antibiotics or medication as prescribed by your veterinarian.

Related: How To Quarantine Shrimp?

Related: How To Quarantine New Aquarium Plants?

How to Quarantine New Freshwater Fish (Step by Step)

Freshwater fish are vulnerable to a variety of opportunistic infections from natural sources and on other animals. These infectious diseases frequently manifest clinically in response to stressors such as transportation and environmental changes.

Step 2) Acquisition Planning

The occurrence and husbandry care recommendations should be evaluated. If the fish species has previously been obtained, records should be evaluated to assess prior sources, quarantine histories (husbandry, morbidity, mortality, and treatments), time in the collection, physical, chemical, and biological factors, and subsequent causes of mortality and morbidity.

Step 2) Proper Isolation

Ensure an appropriate environment for isolating the fish. In the event of a disease breakout in one quarantine system, each quarantine system should be isolated from the others.

This necessitates separate equipment for each system, appropriate protective equipment (e.g., gloves), hand-washing spaces, and sufficient spacing between the systems. Putting up the tank with care.

When filling the container, avoid using soaps and use water with the same qualities as the main tank. Examine the quarantine tank thoroughly.

Many criteria, such as PH, salinity, temperature, and so on, must be the same as in the main tank to guarantee that the quarantine tank habitat is the same or near to the main tank can sustain the fish’s vitality and health.

3) Ideal Environmental Conditions

The environment must be steady and acceptable for the fish. For systems based on heat exchangers, backup plans should be ready (e.g. a coldwater system housed in a warm room, the temperature of the incoming water may change).

All water quality metrics, including dissolved oxygen, salinity, pH, hardness, and alkalinity, should be optimum. Nitrogenous waste should be avoided.

Step 4) Monitoring

Close monitoring is essential for quarantine success. Infectious infections are likely, and if detected early, both morbidity and death can be decreased greatly.

It is critical to regularly examine the fish’s health and vitality with proper lighting at least 2 times a day and while feeding. Looks for possible issue symptoms to ensure timely tank removal and therapy, or when to remove fish.

Step 5) Reactive Diagnostics and Treatments

Fish should be examined for evidence of disease or parasitism during the quarantine interval. Clumsy swimming, strong undulations, trouble maintaining buoyancy, light hue, and folded fins are all signs of an unwell or stressed fish.

Preventative parasite treatments may be needed during this time, particularly for wild-caught fish. In a quarantine tank, dealing with any signs of sickness is considerably easier than in a set-up aquarium.

Even if the fish appear to be healthy, a prophylactic treatment plan with an appropriate anti-parasite medicine such as formaldehyde solution or potassium permanganate is recommended.

Step 6) Accurate Records

On the medical records database, record quarantine events such as source, water quality, feeding, illness, death, diagnoses, and treatments. Regularly go over the records.

Related: How To Setup A Quarantine Tank? 

Related: Biosecurity in Aquaculture

How To Quarantine New Fish Without a Tank

The best way to avoid this is to quarantine the new fish in a separate tank before introducing it to your main tank. If you don’t have another tank, there are a few ways you can quarantine your new fish without one.

One way is to use a large container such as a bucket or a Sterilite container. Make sure the container is big enough for the new fish to swim around in and has a lid that fits securely. You will also need some water from your main tank and a filter for the quarantine tank.

Fill the container about halfway with water from your main tank and add the filter. Float the new fish in the container for about 15 minutes so it can get used to the temperature of the water.


How long to quarantine a new fish that has ich?

When you get fish has ich, it’s important to put them in quarantine for a few weeks before adding them to your main tank. This will help ensure that they don’t bring any diseases or parasites into your tank.

During the quarantine period, make sure to keep the water quality high and monitor the fish closely for signs of illness. If you see any signs of illness, treat the fish with medication as prescribed by your vet.

Be sure to feed the fish a good diet during quarantine, as this will help them build up their immunity and reduce the likelihood of getting sick.

Once the quarantine period is over, you can add the fish to your main tank. Just be sure to keep an eye on them for a few weeks to make sure that they don’t show any signs of illness.