Understanding Unfiltered Ecosystems
Setting up an aquarium often raises the question ‘do aquariums need filters?’ Most aquariums will need filters to keep the water clean and oxygenated. However, some fish can survive with extremely minimal and even zero filtered water tanks. This blog focuses on which fish can survive without filters, the level of care needed, and ways to keep their environment reasonable.
Why Having Fish That Do Not Require a Filter is Ideal
Choosing certain fish which can survive without filters can be advantageous because of a number of reasons.
- Minimal Effort: Unfiltered tanks are simpler to set up and maintained because they don’t need as much equipment.
- Budget Friendly: Filters are some of the most expensive pieces of equipment. Not having to buy filter equipment and will greatly reduce the electricity costs for the tank.
- Behavioral Enrichment: Some fish will be able to do better in low oxygen water, which is the opposite of what is commonly assumed.
Top Fish Species That Can Survive Without A Filter
Below are some of the best fish species that can survive without filters.
- Betta Fish
One of the most popular fish for beginners is the betta fish. Betta fish are known for their brilliant colors and long, flowing fins. They are able to adjust to minimal filtration, and even some tanks. small in size. However, they do require regular water changes to keep the tank water cleaner. - Goldfish
Goldfish are hardy fish which are able to withstand a broad range of conditions. That produce a lot of rubbish so while they can go without a filter, frequent changes of water are essential to maintain the ecological equilibrium of the biotope. - Guppies
Guppies are small, colorful fish that are relatively low-maintenance, requiring minimal attentiveness and care. They can survive in tanks without external filtration systems, provided the water remains reasonably sanitary. They enjoy living in social conditions, so try to maintain a small school of them to create a lively display. - Killifish
Killifish are hardy, able to endure and survive a wide variety of water conditions including unfiltered aquariums. They are also extremely colorful and readily accept adding interest to an aquarium. - White Cloud Mountain Minnows
This hardy species can endure living in low temperatures and unfiltered tanks, making it a highly adaptable type of fish. They are docile and can be housed with an assortment of small fish, making them ideal for stocking community tanks. - Endlers Livebearers
Similar to guppies, Endlers are small, colorful fish that do well in unfiltered tanks. They are very hardy and are able to cope with different kinds of water, so they are great fish for beginners. - Shrimp and Snails
While they are not fish, certain species of shrimp, like the Cherry Shrimp, and certain types of snail like the Nerite Snail are also able to live in unfiltered tanks. By eating algae and leftover food, they help keep the tank tidy.
Keeping an Aquarium with No Filter
These fish can live without a filter, but they must still have a proper living space which is very important. Some suggestions are:
- Regular water changes: To keep aquariums clean and decrease toxins, perform water changes ideally 20-30 weekly. This is important for unfiltered tanks where waste accumulates rapidly.
- Monitor water parameters: A range of parameters: pH, ammonia, nitrites, and nitrates should be monitored. a proper kit should be gotten to help check the water parameters and to help maintain a safe psychological space for the fish.
- Live plants: Live plants can help with water passports and improve quality. They help with the tank by providing hiding spots for fish and help the overall style of the tank.
- Do not overfeed: Overfeeding is a common mistake that leads to poor quality water and sickness to the fish. Feed fish what they can eat in a few minutes and remove the food that the fish didn’t eat.
Conclusion
For aquarium fish keepers, the ability of fish to thrive without a filter is a huge advantage. Betta fish, goldfish, guppies, and killifish can thrive in unfiltered spaces. Only with proper care and maintenance of the unfiltered fish tanks can they survive.
Inger learning how to better improve and grow her aquarium without a filter can do the steps outlined.
