top of page

How to make a quarantine fish tank

Setting up a quarantine fish tank is an essential step for any aquarist looking to maintain a healthy and thriving aquarium. Quarantine tanks provide a separate environment for new or sick fish, preventing the spread of diseases and parasites to your main tank. In this guide, we'll walk you through the process of setting up a quarantine fish tank, ensuring your aquatic pets stay healthy and happy.

How to make a quarantine fish tank

Choosing the Right Tank:

The first step in setting up a quarantine fish tank is choosing the right tank. A 10 to 20-gallon tank is usually sufficient for most home aquariums. It's important to select a tank that's easy to clean and maintain, as you'll need to monitor the health of your quarantined fish closely.

Essential Equipment:

  • Filter: A simple sponge filter is effective for quarantine tanks, providing both mechanical and biological filtration.

  • Heater: Maintaining the correct temperature is crucial for the health of your fish. Ensure your quarantine tank has a reliable heater.

  • Air Pump: An air pump with an air stone will ensure proper oxygenation of the water.

  • Lighting: While not as critical as in your main tank, a basic lighting setup can help you monitor the fish's health and behavior.

Setting Up the Tank:

  1. Location: Place your quarantine tank in a quiet, stable location away from direct sunlight to prevent stress to the fish.

  2. Water: Use water from your main tank to fill the quarantine tank, ensuring similar water parameters and reducing stress on the fish.

  3. Equipment Installation: Install the filter, heater, and air pump according to the manufacturer's instructions. Make sure the equipment is working properly before introducing any fish.

Introducing Fish to the Quarantine Tank:

When introducing new or sick fish to the quarantine tank, acclimate them slowly to avoid shock. Float the bag in the quarantine tank for about 15 minutes to equalize temperature, then gradually introduce small amounts of quarantine tank water into the bag over the next 30 minutes.

Monitoring and Maintenance:

  • Daily Checks: Monitor the fish for any signs of stress or disease daily. Keep an eye on water temperature and quality.

  • Water Changes: Perform regular water changes, at least 25-30% per week, to maintain water quality.

  • Medication: If treating sick fish, follow the medication instructions carefully, and avoid overmedicating.


Setting up a quarantine fish tank is a simple yet vital process for any aquarist. By following these steps, you can ensure a safe and stress-free environment for new or sick fish, keeping your main aquarium healthy and vibrant. Remember, a little precaution goes a long way in maintaining the wellbeing of your aquatic friends.

By incorporating these steps and tips into your aquarium care routine, you'll be well on your way to creating a safe haven for your aquatic pets, ensuring their health and longevity in your care.

For more details visit our YouTube channel: Blessings Aquarium

Now you can buy fish online: Click Here

Recent Posts

See All


bottom of page