Yes, warm water fish can belong to freshwater fish. Freshwater fish are those that live in freshwater habitats such as rivers, lakes, and streams, while warm water fish are a category of fish that prefer or thrive in warmer water temperatures. Many warm water fish species, such as tilapia, catfish, and certain types of cichlids, are commonly found in freshwater environments. **

No, fish cannot see water. Water is their natural environment, so they do not have the ability to perceive it as a separate entity. Instead, their eyes are adapted to see other objects and creatures in the water, such as prey, predators, and potential mates. Their vision is optimized for detecting movement and differentiating between light and dark areas in their aquatic environment. **

There are several possible reasons why your fish may be swimming sideways. It could be due to a swim bladder disorder, which affects the fish's ability to control its buoyancy. Other potential causes include an injury or infection affecting the fish's balance, or a problem with its inner ear. It is important to monitor your fish closely and consider consulting a veterinarian or a fish expert for a proper diagnosis and treatment. **

Yes, you can use water from another fish tank for fish, but it is important to ensure that the water is clean and free from any harmful substances or diseases. It is recommended to test the water for pH, ammonia, nitrites, and nitrates before using it in a new tank. Additionally, it is important to quarantine any new fish added to the tank to prevent the spread of any potential diseases or parasites. **

The ideal water hardness for fish depends on the specific species of fish being kept. Generally, freshwater fish thrive in water with a moderate hardness level, typically between 100-250 ppm (parts per million) of calcium carbonate. However, some species, such as African cichlids, prefer harder water with a higher mineral content, while others, like discus fish, prefer softer water. It's important to research the specific requirements of the fish species you plan to keep in order to provide them with the most suitable water hardness for their health and well-being. **

The fish is not swimming anymore because it may be sick or injured. Other reasons could include changes in water quality, temperature, or lack of oxygen in the water. Stress, old age, or a lack of food could also be factors causing the fish to stop swimming. It is important to monitor the fish's behavior and environment to determine the cause and take appropriate action to help the fish. **

My fish does not have any swimming problems. It is able to swim freely and navigate its environment without any issues. **

There are three fish swimming on top. **