A filter arrangement for an aquarium is disclosed. The filter arrangement can include a filter housing assembly, a pump assembly, and a transfer tube assembly. In one aspect, the housing assembly and the pump assembly are separately constructed assemblies that are connected to each other via a first dampening member to prevent vibration and sound from being transmitted from the pump assembly to the filter housing assembly. The filter arrangement can further include a second dampening member connecting the pump assembly with the transfer tube assembly to further prevent vibration and sound from being transmitted from the pump assembly to the filter housing assembly. A third dampening member can be provided at a location where the transfer tube assembly is supported within the filter housing assembly to further isolate vibration and sound from being transmitted from the pump assembly to the filter housing assembly via the transfer tube assembly.

A circulation and aeration system 10 for an aquaculture facility including an elongated reservoir for cultivating aquatic species is provided. The system includes a number of vertical manifolds distributed along the length of the reservoir through an interconnecting piping and arranged to generate a number of adjacent rotating liquid flow patterns by injecting aerated water into the reservoir via exhaust ports, wherein each the pattern forms an individual rotating flow cell, and wherein the system further includes at least one airlift pump configured to supply the aerated water into the manifolds. Related facility, methods and uses are further provided.

A circulation and aeration system 10 for an aquaculture facility including an elongated reservoir for cultivating aquatic species is provided. The system includes a number of vertical manifolds distributed along the length of the reservoir through an interconnecting piping and arranged to generate a number of adjacent rotating liquid flow patterns by injecting aerated water into the reservoir via exhaust ports, wherein each the pattern forms an individual rotating flow cell, and wherein the system further includes at least one airlift pump configured to supply the aerated water into the manifolds. Related facility, methods and uses are further provided.

The present invention relates to a method of raising fish in a recirculated aquaculture system which includes a fish holding unit in fluid communication with a water supply, the fish holding unit containing a volume of water defining a water depth, and having an osmotic concentration, an oxygen concentration, a temperature, and a pH. The method includes providing a flow of non-recirculated water to the water supply, the non-recirculated water being different from the water in the fish holding unit with respect to the osmotic concentration, the oxygen concentration, the CO2 concentration, the N2 concentration, the NH4+ concentration, the temperature and/or the pH, providing feed pellets, adding the feed pellets to the non-recirculated water and hydraulically transporting the feed pellets to the fish holding unit. The invention also relates to a RAS facility.

The present invention relates to a method of raising fish in a recirculated aquaculture system which includes a fish holding unit in fluid communication with a water supply, the fish holding unit containing a volume of water defining a water depth, and having an osmotic concentration, an oxygen concentration, a temperature, and a pH. The method includes providing a flow of non-recirculated water to the water supply, the non-recirculated water being different from the water in the fish holding unit with respect to the osmotic concentration, the oxygen concentration, the CO2 concentration, the N2 concentration, the NH4+ concentration, the temperature and/or the pH, providing feed pellets, adding the feed pellets to the non-recirculated water and hydraulically transporting the feed pellets to the fish holding unit. The invention also relates to a RAS facility.

A fish pond filtration device includes a filter tank, a conical filter cylinder, a garbage collection trough, and a sewage pipe; the conical filter cylinder, the garbage collection trough and the sewage pipe are located in the filter tank; water discharge ports are provided in a bottom or a side wall of the filter tank, and the conical filter cylinder is in rotary fit with the filter tank; the garbage collection trough is disposed below a large-diameter end of the conical filter cylinder, a filter port and a sewage discharge port are provided in a bottom of the garbage collection trough, and the sewage discharge port communicates into a sedimentation barrel; and a water pump is disposed at one end of the sewage pipe, the water pump is located in a fish pond, and the other end of the sewage pipe extends into the conical filter cylinder.

A fish pond filtration device includes a filter tank, a conical filter cylinder, a garbage collection trough, and a sewage pipe; the conical filter cylinder, the garbage collection trough and the sewage pipe are located in the filter tank; water discharge ports are provided in a bottom or a side wall of the filter tank, and the conical filter cylinder is in rotary fit with the filter tank; the garbage collection trough is disposed below a large-diameter end of the conical filter cylinder, a filter port and a sewage discharge port are provided in a bottom of the garbage collection trough, and the sewage discharge port communicates into a sedimentation barrel; and a water pump is disposed at one end of the sewage pipe, the water pump is located in a fish pond, and the other end of the sewage pipe extends into the conical filter cylinder.

A filter arrangement for an aquarium is disclosed. The filter arrangement can include a housing assembly, a pump assembly, a transfer tube assembly, and a valve assembly for controlling water flow through the transfer tube assembly. The transfer tube assembly can include a tube structure within which a valve body of the valve assembly is rotatably disposed. The tube structure can be formed from a first tube half mated to a second tube half to permanently secure the valve body within the tube structure. A valve operator can be connected to the valve body to advantageously allow a user to manipulate the flow of water through the transfer tube assembly. Control of water flow through the filter arrangement is beneficial for obtaining a desired water flow for a certain aquarium size and application and for reducing flow during certain periods, such as during feeding.

An aquarium having an adjustable lighting system for enhancing the display of fluorescent objects, such as fluorescent fish, contained within the aquarium under various external lighting conditions, such as a dark room or a brightly lit room. The aquarium comprises a tank and a plurality of light sources. Each light source emits light at a different wavelength spectrum which is selected to enhance the display of the fluorescent object under each type of external lighting condition. An electronic control is provided to control the operation of the plurality of light sources such that each light source may be selectively turned on/off based on the external lighting condition, or chronological criteria, to provide the best viewing experience.

The invention relates to a container assembly comprising a container for depuration of mollusks and a drain canal unit. The assembly provides a closed circulation of water via a circulation route that has an entry portion between the floor of the container and the drain canal unit, a circulation channel between the corner of the container and a drain canal unit, and a drain canal within the drain canal unit. Also provided is a drain canal unit for use in stackable containers that provides circulation of water within a container assembly.