Yes, you can keep crayfish in a Juwel Lido 120l tank. However, it is important to ensure that the tank is suitable for crayfish by providing enough hiding spots, places to climb, and a secure lid to prevent escape. Additionally, crayfish are known to be territorial and may become aggressive towards other tank mates, so it is best to keep them in a species-only tank. Proper filtration and water quality maintenance are also crucial for the health of crayfish in a tank. **

Yes, you can keep crabs in a Juwel Lido 120l tank, but it is important to ensure that the tank is suitable for the specific type of crab you want to keep. Crabs require a suitable substrate, hiding spots, and access to both land and water areas in their tank. It is also important to maintain proper water quality and temperature levels to ensure the health and well-being of the crabs. Research the specific needs of the crab species you are interested in keeping to ensure they are properly cared for in the Juwel Lido 120l tank. **

For a 110-120 liter tank, stocking options can vary depending on the type of fish you want to keep. Some common stocking options include a community tank with small fish like tetras, rasboras, and guppies. Alternatively, you could opt for a species-only tank with a larger fish like angelfish or dwarf cichlids. It's important to research the specific requirements and compatibility of the fish you choose to ensure a healthy and balanced aquarium environment. **

No, a gear chain is not faster than light. According to the theory of relativity, nothing can travel faster than the speed of light in a vacuum, which is approximately 299,792 kilometers per second. A gear chain is a mechanical system used to transmit power from one part of a machine to another, and its speed is limited by the physical properties of the materials and the design of the gears. Therefore, it is not possible for a gear chain to exceed the speed of light. **

The chain may rattle in first gear due to a lack of tension. When the chain is loose, it can move around more freely and make noise as it hits against other components. This can be caused by wear and tear on the chain or sprockets, improper adjustment of the chain tension, or a damaged chain guide. It is important to address this issue promptly to prevent further damage to the chain and other parts of the bike. **

The chain may rattle in 1st gear due to a few reasons. One common reason is that the chain tension may be too loose, causing it to slap against the sprockets and create a rattling noise. Another reason could be worn-out sprockets or a stretched chain, which can also cause the chain to rattle. It's important to address this issue promptly, as a loose or worn-out chain can lead to further damage to the bike's drivetrain. Regular maintenance and proper tensioning of the chain can help prevent this issue. **

The chain hangs after removing the gear because the gear was providing tension and support to the chain. When the gear is removed, the tension is released, causing the chain to hang freely. Additionally, the weight of the chain itself can also contribute to it hanging after the gear is removed. **

The correct gear ratio for a motorcycle chain depends on the specific make and model of the motorcycle, as well as the desired performance characteristics. Generally, the gear ratio is determined by the number of teeth on the front and rear sprockets. A higher gear ratio (more teeth on the front sprocket or fewer teeth on the rear sprocket) will provide more top speed but less acceleration, while a lower gear ratio (fewer teeth on the front sprocket or more teeth on the rear sprocket) will provide better acceleration but lower top speed. It's important to consult the motorcycle's manual or a professional mechanic to determine the correct gear ratio for a specific motorcycle. **