Ethan Rhodes
Setting up an emergency hospital tank is an effective way to prevent the spread of disease in your aquarium. It is a simple way to take control and prevent a disease from becoming a crisis. A hospital tank is a back-up tank used to quarantine sick or injured fish. It should be set up to mimic the conditions in the main tank to minimise stress on the fish. This includes maintaining the same water temperature and reducing water movement. The water quality in the hospital tank must be kept high, and the tank should be cleaned regularly.
| Characteristics | Values |
|---|---|
| Purpose | To prevent the spread of disease and treat sick fish |
| Setup | Fill the tank with water as close to the temperature of the main tank as possible, using a mix of new and old water. |
| Transfer established biomedia from the filter in the main tank to maintain the nitrogen cycle and reduce exposure to toxic ammonia and nitrites. | |
| Install an aquarium heater and thermometer to maintain a stable temperature. | |
| Install an aquarium filter to maintain water quality. A sponge filter is a good option. | |
| Avoid using substrate or gravel in the hospital tank as it can be difficult to clean. | |
| Provide a few places for fish to hide, but avoid unnecessary decorations. | |
| Maintenance | Regularly siphon out leftover food to maintain good water quality. |
| Check water quality frequently and take additional action if needed, such as using more mature filter media or chemical water treatments. | |
| After treating a disease, rinse the tank with brine or a mild bleach solution and replace the sponge and live plants. | |
| Quarantine | Keep newly purchased fish in the hospital tank for observation for at least 7 days to 6 weeks before moving them to the main tank. |
| Transfer sick fish to the hospital tank as early as possible to halt the spread of disease. | |
| Treat sick fish with the chosen remedy and follow instructions. Wait until symptoms clear before returning the fish to the main tank. |
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What You'll Learn
Quarantine new fish
Quarantining new fish is a good practice to ensure the health of your aquarium. Firstly, you should purchase a quarantine tank that is appropriately sized for the new fish, typically around 10-20 gallons. Place the quarantine tank in a different room, away from your main tank, to avoid cross-contamination.
Next, fill the quarantine tank with water. It is recommended to use water from your main tank to help the new fish acclimate quickly. You can also use new water, preferably aged water, but new tap water with a dechlorinator will also work. Ensure you have a matured filter or mature media that can be placed into a filter to maintain the nitrogen cycle and reduce exposure to toxic ammonia and nitrite levels. Keep the filter flow at its lowest setting, as stressed or sick fish will prefer minimal water movement.
Add some substrate from your main tank into a mesh bag and place it directly in the quarantine tank. A bare-bottom tank is ideal as it is easier to maintain and clean. You can also add some decorations and hiding spots to make the new fish feel more comfortable. Install the heater and ensure the temperature is identical to the main tank to prevent shocking the fish.
Finally, transfer the new fish to the quarantine tank. Allow the fish to settle without disturbance for a period of 2 to 4 weeks. During this time, regularly siphon out leftover food to maintain good water quality. If you detect any illnesses, treat the fish accordingly.
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Maintain water quality
Maintaining water quality in a hospital tank is essential for the health of your fish. Here are some detailed steps to help you achieve this:
Firstly, it is important to use filtered water in your hospital tank. An aquarium filter is crucial for maintaining high water quality. The filter helps to keep the water clean and reduces the risk of exposing sick or injured fish to water flow or suction. Sponge filters are an excellent choice for hospital tanks as they offer mechanical and biological filtration without producing a strong flow. Transferring established biomedia from the filter in your main tank to the hospital tank can also help maintain the nitrogen cycle and reduce toxic conditions caused by ammonia and nitrites.
Secondly, regular cleaning and maintenance are vital. This includes siphoning out leftover food, cleaning all surfaces, and promptly removing any waste or spilled food. It is also important to maintain a stable water temperature and keep the tank at the same temperature as your main tank to avoid shocking or stressing the fish.
Additionally, consider keeping your hospital tank running at all times with minimal decorations and, optionally, one or two hardy fish. This approach ensures that the tank is always ready for use in an emergency. If you choose not to keep the tank running constantly, you may need to wait several days for new biological bacteria to seed and colonize the tank before introducing a sick fish.
Remember to monitor the water chemistry and change the water when necessary. It is also recommended to clean and sanitize the hospital tank after each use to prevent the spread of disease and give your fish ample time to recover before reintroducing them to the main tank.
By following these steps, you can effectively maintain water quality in your hospital tank, contributing to the health and recovery of your fish.
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Match the main tank's temperature
Matching the temperature of the hospital tank with the main tank is crucial to prevent causing a shock to the sick fish. The temperature in both tanks should be the same before transferring the fish to the hospital tank.
To match the temperature, you can start by filling the hospital tank with water as close in temperature to the main tank as possible. You can use aged water from the main tank or new tap water with a dechlorinator. Then, use a heater to adjust the temperature of the hospital tank to match the main tank. An aquarium thermometer can help you monitor the temperature.
If you have an extra HOB (Hang On Back) filter, you can run it on your main tank and transfer it to the hospital tank to save time. This will help maintain the nitrogen cycle and reduce exposure to toxic conditions caused by high levels of ammonia and nitrites.
It is also important to minimise water movement in the hospital tank, as stressed, injured, or sick fish prefer calmer waters. Keep the flow of your filter at its lowest setting.
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Minimise water movement
Stressed, injured, or sick fish will prefer as little water movement as possible. To minimise water movement, you should be careful when selecting a filter. Avoid installing something that will produce enough suction or water flow to endanger sick or injured fish. Sponge filters are a good option for hospital tanks as they offer mechanical and biological filtration, keeping the water clean without generating a strong flow. They are also cost-effective and convenient.
Another way to minimise water movement is to avoid using substrate (gravel) in your hospital tank. Substrate dissipates some of the water capacity in the tank, making it harder to calculate medication dosages. A bare-bottom tank is easier to keep clean and maintain.
When setting up your hospital tank, fill it with water as close to the temperature of your main tank as possible to avoid shocking the fish. You can use aged water or new tap water with a dechlorinator. Avoid drastic temperature changes that can stress the fish and adversely affect its body functions.
To further minimise water movement, perform routine water changes and maintain high water quality. Even when the hospital tank is in use, regularly siphon out leftover food to prevent the rapid deterioration of water quality.
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Treat the disease
If you notice any signs of disease in your fish, it is important to act quickly to give them the best chance of survival. Firstly, observe your fish for any signs of ill health. Are they swimming as they usually would? Are their fins free of white fluff and erosion? Are their bodies free of mucous, white spots, or red ulcers? If they are showing any of these symptoms, your fish may have a disease.
Test the water for pH, ammonia, nitrite, and nitrate. Poor water quality could be the cause of their ill health. Remedy the water quality, and they may get better, but they could also develop a secondary infection from the stress caused by living in poor water. If the water quality is not the issue, consider speaking to an expert for assistance with diagnosis and treatment. Take a picture or video and ask at your local fish store or online in a tropical fish health group.
Once you have determined the type of disease, you can obtain the appropriate medicine. If you are unsure, it is recommended to use broad-spectrum medications for bacterial, fungal, and parasitic infections. Treat the fish in a hospital tank, following the instructions for the medication you are using. Be sure to keep the hospital tank in a dark room and dimly lit, as some diseases can be inhibited by little or no light. An air stone can also be useful in an aquarium to help replace oxygen in the water, especially if the medicine reduces the amount of available oxygen.
Monitor the fish for ten days, replacing 30-50% of the water in the hospital tank each day to keep it clean and fresh. If you need to change the water during treatment, add the same amount of medication to the water you are replacing.
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Frequently asked questions
A hospital tank is a back-up tank used to quarantine sick fish and prevent the spread of disease.
To set up an emergency hospital tank, first, fill it with water as close in temperature to your main tank as possible. Then, install an aquarium heater and thermometer to maintain a stable temperature. Transfer established biomedia from the filter in your main tank to the hospital tank to maintain the nitrogen cycle and reduce exposure to toxic ammonia and nitrites. Keep the water clean by siphoning out leftover food and installing an aquarium filter.
It is recommended to set up a hospital tank a few days before you plan on using it to get the biological filtration going. Quarantine newly purchased fish for at least six weeks before moving them to the main tank.
