Aquarium manufacturers typically design and produce water pumps for aquariums, which are used to circulate and filter water to maintain water quality and the health of aquatic organisms. Here are some famous aquarium manufacturers who produce high-quality water pumps:

Eheim: Eheim is a renowned German manufacturer of aquarium equipment that produces various types of water pumps, including internal and external, suitable for different sizes and types of aquariums. Eheim's products are renowned for their high quality and reliability.

Fluval (Fenghua): Fluval is a brand of Hagen Company that provides various aquarium equipment, including water pumps. Their pumps are usually used to circulate and filter water bodies, ensuring clear water quality.

Hydor: Hydor is an Italian company specializing in the manufacturing of aquarium equipment. They produce various types of water pumps, including built-in and external water pumps, as well as circulating pumps.

Tetra: Tetra is a global manufacturer of aquarium equipment, providing various types of water pumps suitable for different aquarium needs. Their products are usually moderately priced.

AquaClear: AquaClear is another brand of Hagen Company that produces external filters and pumps, widely used in aquarium filtration systems.

Sicce: Sicce is an Italian manufacturer of aquarium equipment that produces various types of pumps, including high-performance pumps for freshwater and seawater aquariums.

Jebao: Jebao is a Chinese company that provides various types of aquarium equipment, including economical and high-performance water pumps.

Choosing the right water pump for your aquarium depends on the type, size, and needs of your aquarium. Before purchasing a water pump, make sure you understand the flow rate and pump type required for your aquarium (such as built-in, external, circulating pump, etc.) to ensure that it meets the requirements of your aquarium. In addition, pay attention to regular maintenance and cleaning of the water pump to ensure its long-term reliability and performance.