Aquarium husbandry involves taking care of various aspects of an aquarium, from proper water changes to refugium setup. It also involves caring for various fish diseases and treatments. Understanding these topics will help you maintain a healthy aquarium and protect your fish from diseases and other health issues.

Water changes

Water changes in aquarium husbandry are a common practice. These changes can be large or small and are usually done in batches of about 10 to 30 percent. Many reef aquarists will change their water as frequently as once a month. These changes can be performed manually or through a skimmer.


Refugiums can be a useful tool for aquarium husbandry. These structures are usually used to hold excess nutrients. Refugiums are not intended to be a permanent fixture in the tank but should be easily removed and cleaned. The size of a refugium can vary, depending on your needs.

Fish diseases

Fish owners have a responsibility to ensure the health of their fish. They should know about common diseases and how to treat them in the earliest stages. In many cases, the disease is preventable.


A variety of treatments for aquarium husbandry are available to combat various conditions. Among them is a solution for fungal infections. Potassium permanganate is a common treatment that can be added to the water, and this can kill external pathogens that cling to the fish’s skin. It is most effective when the water temperature is 82 degrees Fahrenheit. Other treatments can help eliminate parasites, such as gill mites. These parasites attach to the skin of fish and feed on their blood.

Quarantine/hospital tank

When setting up a quarantine/hospital tank, the first thing is to test the water quality. Even though you can use a pre-established filter media, you need to make sure that the new species you’re introducing will be able to tolerate the water. You’ll also want to research the fish species’ tolerance for pH, kH, and gH. Some fish may need a more secluded environment.


As an aquarium technician, you’ll work to ensure the welfare of the animals and maintain a high standard of animal husbandry. You’ll also assist in developing excellent exhibits, maintaining the facilities and equipment, and contributing to the aquarium’s mission. In addition, you’ll be expected to perform the duties you’ll perform, including feeding the livestock, carrying out general housekeeping in the back house husbandry areas, and keeping track of consumables inventory.