How to Quarantine Aquarium Plants

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by Jason Matthews



Aquarium plants are necessary to build a flourishing ecosystem for your fish and other aquatic life. Aside from providing great aesthetics, aquatic plants help balance your tank’s PH levels, provide a hiding place or shelter for your fish, and create a living space that mimics the natural environment.

One of the most crucial steps will be to quarantine, that is, to isolate the plants in a controlled environment before introducing them to the rest of the aquarium habitat.

You can quarantine aquarium plants by keeping them in a separate tank for 3-4 weeks, with weekly water changes. Alternatively, you can shorten the time frame with a 1-week quarantine, as long as you change the water daily and treat the isolation tank with a pesticide-binding water conditioner. 

Whether starting from scratch or adding new plants to an existing setup, this guide will help you safely and effectively quarantine aquarium plants to protect your tank’s residents from harmful microbes, chemicals, and parasites. 

What Do Aquarium Plants Add to an Aquarium? 

Plants are more than just a beautiful addition to an aquarium, though some at-home aquariums utilize plastic plants for this purpose. 

Real plants provide benefits for the whole underwater habitat by balancing oxygen and carbon dioxide, slowing the growth of algae, and providing shelter for the underwater creatures to mimic the natural environment.

In exchange, the plants thrive on the rich nutrients naturally produced by the creatures that they cohabitate with. 

How to Quarantine Aquarium Plants

Aquarium Plants

When introducing new live plants to your aquarium, it is an essential step to isolate them in a controlled environment so that you can learn what the plant needs to grow successfully. 

Similar to introducing a new pet into a home where there are already one or more pets, the isolation period allows for a gentle, controlled encounter with the surroundings.

Unfortunately, live plants often harbor microscopic algae, snails or their eggs, and predatory insects that can disrupt the aquarium ecosystem. 

Several methods are available to quarantine your aquarium plants, from casual to more exact and scientific. We have provided some examples that will help your aquarium adventure. 

Related article: How to dispose of aquarium snails


Before beginning quarantine, you should sterilize your plants. This step helps kill off a large portion of the unwanted hitchhikers.

Be sure to wear gloves to protect your skin from harsh chemicals. 

Hydrogen Peroxide Dip

Hydrogen peroxide is an inexpensive antiseptic that will help flush away parasites, fungi, and bacteria. 

  1. Mix 1-3 mL of 3% hydrogen peroxide into a gallon of water. Use less for more sensitive species. 
  2. Place your plants in the mix for 5 minutes. 
  3. Remove the plants and gently rinse them in fresh water before transitioning them to the isolation tank. 

Bleach Dip

This household cleaning staple effectively neutralizes the same organisms as hydrogen peroxide. 

  1. Prepare a 1:20 mix of bleach to water and a separate rinse container of de-chlorinator and water. 
  2. Add your plants to the bleach water for 1 1/2 to 2 minutes. 
  3. Remove the plants and rinse well. 
  4. Add them to the dechlorinating solution for at least 5 minutes. 

Full Quarantine

Quarantining your aquarium plants is straightforward, so long as you have a second tank to house them in. 

Simply fill the isolation tank with water, place your plants in their temporary shelter, and provide them with adequate light. 

Over the next 3-4 weeks, perform weekly water changes followed by a few drops of aquarium plant fertilizer. 

Most vegetation gets plenty of nutrients in an inhabited, established aquarium, but they’ll need a boost of nutrients during their quarantine. 

Related article: How to Make Driftwood Safe for Aquarium

Quick Quarantine

aqaurium plants

Suppose you don’t have the means or space to perform a proper plant quarantine. 

In that case, placing your new plant in a separate container for at least a day will still be beneficial. Just remember to change the water every 8-10 hours.

This, at minimum, ensures that most microorganisms latched onto the plant have been flushed away. 

What are the Benefits of Quarantining Aquarium Plants?

Overall, a proper quarantine process is one of the most beneficial and proactive ways to take care of your aquarium. 

Plants, just like animals and even humans, are capable of holding onto potentially toxic or hazardous materials and chemicals. 

Quarantining your aquatic plants is the best way to ensure that any unwanted chemicals or microorganisms are not carried from one habitat to the next.

What Happens if I Don’t Quarantine?

Sometimes, quarantine is impossible due to time or space constraints. 

Unfortunately, if you do not quarantine your plants, there will likely be irreversible effects on your aquarium’s overall habitat. Your plant and its aquatic neighbors could face some casualties. 

Depending on where your plant came from, it may harbor pesticides, microorganisms, diseases, or algae buildup. 

The quarantine period is to help rid the plant of those unwanted elements and avoid bringing them into the aquarium environment.

Symptoms of Poorly Quarantined Plants

After you’ve quarantined and introduced your vegetation into your aquarium, keep a close watch on your aquarium for signs of trouble. 

If there is an increase in algae buildup, death of fish, or you notice an unanticipated invasive species – whether it is a plant or animal variety– you may not have quarantined your plants properly.

This could mean that you did not quarantine the plants for long enough, you did not change out the water in the quarantine frequently enough, or the sterilization process did not kill off the desired pests. 

It is best to be vigilant in your observations and take action as soon as you can.

Related article: Our guide on caring for live aquarium plants


Aquarium enthusiasts that are eager to introduce new plant life into their tank should have an established routine for how to quarantine aquarium plants or risk introducing dangerous unwanted guests into their tanks.

Taking these necessary steps protects your investment in your aquarium hobby and protects the living creatures under your care from undue harm. 

It also helps ensure that the plant species you pick are well-suited to the water conditions and lighting in your home.


Jason Matthews

My name is Jason Matthews, and welcome to my website. When other kids were bragging about how their dog could sit and roll over, I was bragging about my latest Betta Fish and the cool sea castle I just added to his aquarium. 

Jason aquariume

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1 thought on “How to Quarantine Aquarium Plants”

  1. Great information about quarantining aquatic plants. I really love this hobby learning new techniques everyday help me improve my knowledge to this great hobby


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