JellyFish Facts

Maintaining Your Jelly Tank

Maintaining Your Jelly Tank picture

Maintaining Your Jelly Tank

The last aspect of raising jellyfish that must be discussed is maintaining your tank. Keeping everything in your tank in a state of homeostasis is rather important. Your jellies need a constant flow of water as well as a stable temperature. They should also be offered a steady flow of food. Maintaining the bacteria in your tank is also crucial in order to ensure that ammonia levels to not build up to toxic levels in the water. This chapter is devoted to helping you fully maintain your aquarium. Once you have mastered this knowledge, you will be well equipped to raise your jellyfish at home.

While maintaining a jellyfish tank may seem like it will be a simple task, there is actually much to do. It is true that the lack of decorations and objects in the tank will make certain aspects of maintenance easier, but working with such fragile creatures adds its own degree of difficulty. The first step in maintaining your tank is to purchase a water testing kit. This will help you measure many different levels within your tank.

The most common part of maintenance for your jellyfish will be eliminating diatom growth from your tank. This material will build up on the walls and screen of your tank. For a while, you will be able to simply remove it suing special cleaning cloths. These cloths can be attached to a small pole for larger tanks and used to wipe the walls. No matter what you use to clean your tanks, it is crucial to do so slowly and gently so that if you come into contact with your jellyfish you do not rupture their fragile membranes.

When the growth of diatoms in your tank has become unmanageable, you will need to fully clean the tank. This is where your experience in moving the jellyfish will come in handy. The jellies will need to be very gently removed from the tank and placed in bags or buckets. It is important to keep them away from children and pets until they are ready to be put back into the tank.

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Once the fish have been removed from the tank, you can turn off the pumps and filters and remove the amount of water from the tank that you intend to add as bleach. If you are adding a liter of bleach, for example, you will want to remove a liter of water. Once the level of diatoms has dropped, which usually takes around an hour, you can add dechlorinator to the water. Every half gallon of bleach added will require about a half cup of dechlorinator. The water will turn clear when the process has finished. You will then need to siphon all of the water and debris from the tank.

As an added precaution, you may want to fill and drain the tank once more. Once this is finished, you will add new seawater to your tank and turn it on. Ensure that the temperature in the tank is back up to the proper temperature for the jellyfish and you can safely but gently return them to the water. If you kept them in bags, you can simply place the bags into the aquarium and open them.

When you return the jellyfish to the tank, you will want to watch them for a brief period of time to ensure that they are not contracting their tentacles, pulsing irregularly, or showing any other signs that there is still bleach in the water. If this happens, they must be gently but quickly removed from the water in order to keep them alive.

The other aspect of maintenance that you will need to perform regularly is siphoning. While most fish are able to easily move away from suction, your jellies are not able to do so. It is absolutely imperative that you keep your jellies from coming into contact from the suction. Using tubing that can quickly be pinched to stop air flow if needed is highly recommended. Siphoning your tank to get rid of any debris is important, but it must be done very carefully.

Chapter Summary


Maintaining your jellyfish tank is quite easy. Once you understand how to safely move the jellies, it can be done quickly and without stress. The most important thing is simply to be patient and to monitor your jellies for any signs of injury or distress.

Next: Jellyfish In Aquariums Final Words

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Written by and Sudarsana Sinha.

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