How To Quarantine Fish Without A Tank? (6 Easy Steps)

It is obvious that you need to quarantine fish before introducing them to your tank. 

While it is necessary, you must understand every process of it. Any wrong step can cause severe damage to your tank, including other fish. 

Now it’s easy to quarantine fish with a tank but what to do if you don’t have any separate fish tank.

To help you here we come with an easy and money-saving option on how to quarantine fish without a tank.

How To Quarantine Fish Without A Tank?

Can You Quarantine Fish Without A Tank?

Yes, it is possible to quarantine a fish without a tank. But, you have to find an alternative to a tank

In that case, a large size bucket is an excellent alternative. I am sure it will do the job without costing extra money for a new tank. 

Most of the experts will share information about how to quarantine a fish in a tank. I am going to explain how to do that without a tank. 

How To Quarantine Fish Without A Tank? (Step by Step Process)

It is time to show the exact process of how to quarantine fish without a tank. Follow these procedures to ensure the perfect quarantining of your new fish. 

But first, let’s see what we need to do in this process. 

  • A large bucket
  • Aquarium salt
  • Antibiotic, Antifungal
  • Anti-parasite
  • Water test kit

Now you have everything that you need to do all these processes, so let’s get started. 

Step 1: Use a Clean Bucket with Clean Water

First, make sure you have a clean bucket. Then pour it with clean water. Next, make sure your bucket is complete with clean water.

Step 2: Check the Water Parameter

Well, we have clean water in our bucket. Now monitor the water parameter with a water test kit. Check the pH of water and ammonia nitrate levels. 

We are going to treat everything according to the test results. Ensure everything is alright. Also, monitor the water every few days so that it is okay.

Step 3: Treat Parasites

Now it is time to introduce your fish into the bucket. Then use any anti-parasite medicine such as ParaGuard to treat any external parasites that come with the fish. 

In that case, you must follow the instructions that come with the mixture. If it says anything is needed to change in water, then do that also. 

One more thing you need to follow up on is if you have any weak fish that may not survive this procedure. You will always have that risk. 

Unfortunately, you have nothing to do about this. And, you must continue this process to save other fishes in your main tank.

Step 4: Add Aquarium Salt

After treating the parasite,it is imperative to add aquarium salt into the bucket. Aquarium salt will treat any itching problem. 

But, this is very dangerous for invertebrates and plants. So, never perform this action in your tank. That is the reason we are doing this separately.

According to the fish, you have to use different portions of salt. If you have sensitive fish, then 0.2% salt is enough. And, you have to add 0.1% salt on the first day and rest 0.1% on the second day. 

But for hard fishes such as goldfish, you must add 0.5% salt to the water. Again you have to add 0.1% salt every day for the next five days. 

Also, every time you need to change the water, you must follow these actions to maintain everything properly. 

Step 5: Change Water

Change water every few days and perform the above actions from the beginning. 

It will ensure you are doing the proper treatment. And your new fish will be free from any kinds of diseases that can cause severe damage to your main fish tank. 

You have to follow these procedures for two to four weeks. The longer you will do that, the better protection you will get. But four weeks is enough for that. 

Step 6: Move New Fish to the Tank.

If you have done the above processes correctly, it is time to move your new fish into the main tank. And, I am sure you have enough for getting protection from any diseases for your fish. 

Is It Necessary To Quarantine A New Fish?

Indeed. Whether you are buying fish from another tank or market, there is always a chance to carry different kinds of diseases with the fish. 

For example, it is widespread among fish to have parasites, fish tuberculosis, and other diseases. If that happens, it will spread in your tank and attack other fish. 

As a result, you may find the end of the beautiful fishes you have been nursing for years. So why should you take that extreme risk? 

It is always necessary to quarantine a new fish before introducing them into your tank by taking that risk factor in mind. 

However, it could be a painful process for you. But I bet it can save your entire fish tank from unwanted diseases. 

How Long Should Fish Be Quarantined?

Since you have a broad idea about the necessity of quarantining a new fish, then the first thing that comes to mind, how long should fish be quarantined?

Usually, you need to quarantine new fish for two to four weeks to ensure fishes are out of any kinds of diseases. In that period, you have to follow a few procedures, which I will explain later in this article.

But, you must keep patience and make sure you are doing the right thing to achieve better results for your valuable fish tank.


Using a tank for doing fish quarantine is an ideal method. 

If you can not get a new tank for any reason, then I would suggest an alternative such as the bucket method. 

Although it is different from using a tank, changing the water might be tricky for you while using a bucket instead of a tank. At least you are doing the right thing for your main tank and fish. This process may take time and effort, but it is well worth it to save your tank from any disease. 

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