Currently, for those who are new to aquascaping, there is often a tendency to keep fish in small aquariums without oxygen filters to save costs. However, this can lead to oxygen deficiency in the tank, resulting in fish deaths. Therefore, to remedy this situation, we should start with easier-to-keep fish species. Let’s join Aqua Plants Hub to explore a few fish species that do not require oxygen that adapt well to oxygen-free environments in the article below!
1. Betta Fish
Betta Fish, also known as Betta, is a relatively popular fish species. It is also known among aquarists as Siamese Fighting Fish and Betta Splendens.
This is one of the fish species that can live in low-oxygen environments. This is due to its ability to provide oxygen for itself directly from the air through gill respiration.
This species is relatively easy to keep and can thrive in small spaces. However, for optimal growth, you should equip a spacious aquarium to meet the living needs of this fish. One thing to note is that when keeping Betta fish, it is advisable not to keep them with other species, as they are very aggressive and will attack other fish in the same tank.
2. Guppy Fish
Guppy Fish
Guppy Fish is another name for this species. They are closely related to other guppy species, such as Endler’s Livebearer and Platies. This is one of the easier and more popular fish to keep due to its high adaptability in low-oxygen and low-light environments.
Guppy Fish is a species that lives in the surface water layer. Therefore, during the breeding process, there is no need to install an oxygen supply machine. This species can actively swim to the surface to provide oxygen when needed.
Additionally, this species can go without food for over a week and still thrive. Guppy Fish adapts well to various water environments and reproduces relatively quickly. If kept in a favorable environment, they will produce many new fry.
3. Danio Fish
Danio Fish
Danio Fish, also known as Zebra Fish, is a small fish species covered by five stripes. This species is quite peaceful and easy to keep, adapting well to different environments.
Due to its ability to thrive in harsh environments, this species can grow in the middle water layer without needing oxygen. Danio Fish live in schools. When starting to keep them, you should begin with 5 to 7 fish. This will help them feel less intimidated in the new environment and reduce stress.
4. Paradise Fish – Popular fish that do not require oxygen
Paradise Fish
Paradise Fish is known for its long fins and unique beauty.
This species has an extremely strong survival ability in various environments. Paradise Fish can thrive even in murky water and low-oxygen conditions, thanks to its direct breathing ability.
This will be a species worth considering for beginners in aquascaping without experience in setting up and maintaining tanks. However, they can be quite aggressive and temperamental, leading to conflicts between species, especially in mini tanks.
5. Goldfish – Easy-to-keep fish that do not require oxygen
Goldfish
Goldfish is a well-known species. It is an ideal choice for those who do not have much experience in keeping fish. This species can thrive well in low-oxygen environments.
However, this species can grow quite large and produces a lot of waste. Therefore, it is necessary to provide a sufficiently large and clean tank environment to ensure the health of the fish as well as the aesthetics of your aquarium.
Thus, here are 5 fish species that do not require oxygen and are very easy to keep for beginners in this hobby. Aqua Plants Hub hopes you can choose your favorite species that suits your needs!
Ngô Châu Nhi
