An impeller for use in an aquarium filter pump includes a shaft and a plurality of impeller blades radially extending from the shaft. Each of the impeller blades includes opposite blade faces. A depression is in each of the blade faces and aids in pushing the water. The depression can be a variety of shapes and can have its deepest portion along one of the edges of the blade.

An aquarium skimmer device can include a filter body that attaches to a water pump, filter, or power head, wherein the filter body is configured to hold a filter medium for filtering water that passes through the filter body. The skimmer device can also include a funnel holder that attaches to a top of the filter body, and a funnel assembly comprising a funnel. The funnel assembly can be received by the funnel holder and configured to float up and down with respect to the funnel holder with changes in water level, and a wide opening of the funnel is positioned one inch or less below a surface of the water.

The present invention relates to an indoor aquaponics assembly which includes a base, an aquarium positioned above and supported by the base, a planter positioned above the aquarium, an aquarium conduit and a planter conduit. The planter is provided with at least two through holes facing towards the aquarium, one being adapted for a water drainage tube to pass through for draining water from the planter to the aquarium, and one being adapted for a tube of a pump to pass through for pumping water from the aquarium to the planter. The present invention aims at reducing the time and efforts required for caring and maintaining the aquarium and the plants.

A method for degassing carbon dioxide from a stream of water is provided, whereby water is supplied at a predefined volumetric flow to a gas balancing filter, wherein the water in a first step is collected in a basin with a free upper surface and a depth and in a second step is allowed to flow out of the basin through at least one orifice provided beneath the free upper surface and in a third step the water flowing out of the orifice is allowed to free-fall a distance D through a controlled atmosphere and is then collected in a further basin provided beneath the basin. The invention comprises the further steps that the first, second and third steps are repeated two or more times with basins provided consecutively below each other. A gas balancing filter is also provided.

An energy efficient aquaculture system combining mixed-cell and raceway configurations. The system comprises a raceway tank, a raceway channel, a first water purification subsystem, and a second water purification subsystem. The system may include one or more of a hatching subsystem, a nursery subsystem, a feeding subsystem, a finishing subsystem, and a fish pumping system for transfer of fish between raceway tanks. A method of growing fish for commercial production using the aquaculture system is also provided.

An exemplary water circulation pump pre-filter unit (PFU) comprises a backwash pipe in fluid communication with an outer nozzle outside a screen cage and an inner nozzle within the screen cage. The PFU may simultaneously spray inside and outside the screen cage using an inner nozzle and an outer nozzle configured with an axial jet perpendicular to a plurality of radial jets. The inner nozzle may have a restriction chamber with diameter decreasing in flow direction to a full cone nozzle outlet, concentrating dual streams from a plurality of inlets swirled through a plurality of helical channels. Pairs of inner nozzles may be angled to each other, increasing the inner surface area cleaned. Exemplary implementations may simultaneously clean the screen cage bottom and top using the outer nozzle and inner nozzles in backwash mode and in a separate pre-filter mode ingest water through multiple filter pipe inlet apertures.

The present disclosure relates to emersed shellfish storage. A container support has a surface to support containers. Each container has respective cells to accommodate live shellfish, such as lobster, in a vertical orientation substantially perpendicular to the surface. Water from a reservoir is pumped, intermittently in some embodiments, to one or more of the containers above the shellfish, and a collector collects and provides to the reservoir the water that is pumped by the pump system and flows over the shellfish. In an embodiment, the cells are provided by a divider that divides an interior space of each container, and the divider carries a perforated top insert at or below a top edge of each container, to distribute fluids to the cells.

A system for transferring marine life within an aquaculture facility including a plurality of segregated storage facilities each containing water for marine life, maintained within a predetermined temperature range and supported at independent ground levels. The storage facilities are successively disposed and structured to contain marine life at different stages of growth. A transfer assembly includes a path of fluid flow interconnecting successive ones of said plurality of storage facilities in fluid communication with one another, wherein at least a majority of a length of said path of fluid flow is disposed beneath the independent ground levels at a predetermined depth, which is sufficient to facilitate maintenance of the path of fluid flow within the predetermined temperature range, via geothermal cooling. The transfer assembly may also connect a holding facility, which may be dimensioned and structured to transfer mature marine life, possibly on an on-demand basis, to the harvesting facility.

A device and method are provided for enhancing the feeding response of larval fish to feedstock. A food distribution mechanism is positionable above the tank housing the larval fish and is adapted for receiving the feedstock therein. The food distribution mechanism selectively deposits portions of the feedstock into the tank. A light source is positionable adjacent the tank and selectively directs a laser beam at the tank. A controller is operatively connected to the food distribution mechanism and the light source. The controller is configured to actuate the food distribution mechanism for a time period at selected intervals such that the food distribution mechanism deposits a portion of the feedstock into the tank during each time period. In addition, the controller is configured to actuate the light source for at least a portion of each time period.

In a water tank set with a filter, which includes the filter within a water tank main body, the water tank main body is formed in a vessel-shape having an upper surface thereof opened, storage water being to be stored in the water tank main body, the filter being provided in an interior of the water tank main body. The water tank main body and a filter case of the filter are formed opaque and in a same color as each other. Accordingly, it is difficult for an appreciator who appreciates aquarium fish to see a filter, which is provided within a water tank, from outside of the water tank, thereby enhancing appreciation effects of the aquarium fish.