Top 9 Aquarium Fish That can Survive Without Aeration & Filtration

Aquariums are a fascinating way to bring nature into your home, but setting one up can seem daunting, especially with the need for equipment like air pumps and filtration systems. However, certain fish species are well-suited for low-tech setups. These fish can thrive in environments without additional aeration or filtration, provided you maintain regular water changes and ensure proper care.

Here is a list of fish that can live without an air pump and filtration:

9. Shrimp and Snails

While not fish, shrimp (like cherry shrimp) and snails (such as nerite snails) can thrive in low-tech aquariums and help keep the tank clean by eating algae and leftover food.

• Tank size: Varies; generally 20 liters or more
• Care tips: Provide plenty of vegetation and ensure stable water conditions.
  
  
  

8. Platy Fish (Xiphophorus maculatus)

Platies are lively and hardy fish that can adapt to a variety of environments. They come in a wide range of colors and patterns, making them a vibrant addition to any tank.

• Tank size: Minimum 38 liters
• Care tips: Avoid overfeeding to maintain water quality.

7. Killifish

Killifish are diverse, colorful fish that can thrive in simple setups. Many species are accustomed to still or slow-moving waters in the wild, making them suitable for unfiltered tanks.

• Tank size: Varies by species, but typically 19-38 liters
• Care tips: Some killifish prefer specific water parameters, so research the species you choose.

6. White Cloud Mountain Minnows (Tanichthys albonubes)

White Cloud Mountain Minnows are peaceful, small fish that can tolerate a wide range of temperatures and do not require additional aeration.

• Tank size: Minimum 38 liters
• Care tips: Keep them in groups and ensure the water is not too warm (18-22°C).

5. Endler’s Livebearers (Poecilia wingei)

Endler’s livebearers are closely related to guppies and share their hardy nature. These small, colorful fish are perfect for nano tanks and require minimal equipment.

• Tank size: Minimum 19 liters
• Care tips: Feed them a varied diet and maintain regular water changes.

4. Paradise Fish (Macropodus opercularis)

Similar to bettas, paradise fish have a labyrinth organ that allows them to breathe atmospheric air. They are resilient and can thrive in unfiltered tanks, though they prefer cooler water (20-24°C).

• Tank size: Minimum 38 liters
• Care tips: Provide plenty of hiding spots and avoid keeping them with smaller, more passive fish.

3. Zebra Danios (Danio rerio)

Zebra Danios are active and hardy fish that can adapt to various water conditions. They’re excellent for beginners and can thrive in tanks without an air pump if the water is well-maintained.

• Tank size: Minimum 38 liters
• Care tips: Keep them in groups of at least five to reduce stress.

2. Guppies (Poecilia reticulata)

Guppies are colorful, easy-to-care-for fish that can survive in low-tech tanks. They can tolerate a wide range of water conditions, but clean water is essential for their health and vibrancy.

• Tank size: Minimum 19 liters
• Care tips: Avoid overcrowding and keep a small group to prevent loneliness.

1. Betta Fish (Betta splendens)

Betta fish, also known as Siamese fighting fish, are one of the most popular choices for low-tech aquariums. They possess a labyrinth organ, which allows them to breathe air directly from the surface. Bettas are hardy and can adapt to smaller tanks, though they still need clean, warm water (24-27°C).

• Tank size: Minimum 9.5 liters
• Care tips: Perform weekly water changes and avoid housing them with aggressive tank mates.

General Care Tips for Low-Tech Tanks

• Water changes: Perform regular partial water changes (about 25-30% weekly) to keep the water clean.
• Live plants: Add live plants like java moss or anubias, which can help oxygenate the water and absorb toxins.
• Feeding: Avoid overfeeding, as uneaten food can degrade water quality.
• Temperature: Use a heater if necessary to maintain a stable temperature suitable for your fish.

By choosing the right fish and maintaining a healthy environment, you can create a beautiful, low-maintenance aquarium that doesn’t rely on an air pump or filtration system. Happy fishkeeping!