The primary way described to share water between fish tanks, which also allows fish to pass through, is by using a water bridge.
What is a Water Bridge?
A water bridge serves as a unique connection method between two separate aquariums. According to the reference provided:
A water bridge is just a tunnel that connects two aquariums from above. It comes out the top of one aquarium and goes down into the other, so that the ends are submerged in water in separate tanks. When done properly, water flows through the tunnel so that fish can swim through.
Essentially, it creates a sealed, elevated tunnel filled with water that extends from the water level in one tank, arches over the space between the tanks, and dips down into the water level of the second tank.
How Does a Water Bridge Work?
The principle behind a water bridge relies on creating a continuous column of water held in place by atmospheric pressure.
Here's a simplified breakdown:
- Sealed Structure: The bridge is a sealed tunnel, usually made of clear acrylic or glass, open only at the submerged ends.
- Submerged Ends: Both ends of the tunnel must be placed deep enough below the water surface in each tank.
- Creating the Seal: The tunnel is typically filled with water (often using a siphon method or by carefully submerging and sealing it) before being positioned.
- Maintaining Flow/Connection: As long as the ends remain submerged and the seal is intact, water will fill the entire tunnel, connecting the two tanks. The water levels in both tanks influence the flow within the bridge.
Benefits and Considerations
The main benefit highlighted is the ability for fish to swim freely between the connected tanks, providing them with more space and a changed environment.
- Increased Space: Fish can utilize the volume of both tanks.
- Environmental Enrichment: Allows fish to explore different areas.
- Visual Interest: A unique display piece for aquarium enthusiasts.
While the reference doesn't detail installation, achieving proper water flow and ensuring the seal is maintained are crucial for the bridge to function correctly.
