A high-density keeping-alive box for fish and a transport method using same. The keeping-alive box includes a box body and a cover assembly. The box body includes a fish accommodating area and a water circulation area. A cover of the cover assembly on the fish accommodating area is pivotedly connected to the box body, and is provided with a vent hole to prevent splash. A connection between the cover assembly and the box body is provided with a splash-proof rubber. The water circulation area is arranged at a side inside the box body. The water circulation area includes a purification system, a refrigerator and an aeration system arranged sequentially. The purification system includes a primary filtration area, a secondary filtration area, an activated carbon filtration area and an ultraviolet (UV) sterilization area.

A device for flushing seafood includes a cylindrical conduit having a connector end connected to a water flow valve and an elbow end having an elbow fitting. A water discharging drop pipe connected to the elbow fitting defines water discharging orifices. The drop pipe is fixed to an inner support leg, a bend is connected to the cylindrical pipe, and the outer clamp is engaged to an outer surface of an ice chest via threaded bolt in a removable mounted position. The inner support leg engages an inner surface of the ice chest when the drop pipe is disposed inside the ice chest such that when the water flow valve is opened a flow of water through the drop pipe discharges the water out through the water discharging orifices toward the inner surface of the ice chest in a spaced relationship to the drop pipe.

A specific gravity measurement apparatus has a specific gravity hydrometer that carries a codestrip at the top. A linear optical encoder is disposed to view the codestrip and to output electronic signals that are indicative of a movement of the codestrip relative to said encoder. The movement is indicative of a change in the specific gravity of the liquid, such as a change in a salinity of the aquarium water in which the hydrometer floats. The measurement apparatus may be incorporated into a saltwater aquarium salinity control system where an electronic controller uses the measurement inputs to control a plurality of pumps for selectively adding saltwater or freshwater to the aquarium water in order to control the salinity of the water at a given setpoint level.

A water change system comprises a water change device that performs automated water changes. The water change device automatically drains an amount of water needing replacement from a reservoir and replenishes the reservoir with a predetermined amount of clean water. The water change device comprises a reservoir port, an output port, an input port, a controller, and an enclosure. In a draining mode, water is pumped from the reservoir, through the reservoir port and into a drain or output tank via the output port. In the reservoir filling mode, clean water from an input tank or water source is pumped into the input port of the water change device and to the reservoir via the reservoir port. The water change device automatically performs water changes in accordance with a water change schedule or in response to user input. The water change device is configurable via a touch display or remotely.

The circulating water system for intensive aquaculture disclosed herein includes a submersible pump, an outlet tube, an outer casing tube and a deflector plate. The submersible pump is adapted for being mounted on the bottom of an aquaculture pool at a position close to the circumferential wall. The outlet tube has a tapered section sleeved onto a discharge port, while the outer casing tube is sheathed outside the outlet tube. The deflector plate is mounted laterally to the submersible pump, such that when the submersible pump is pumping water from the aquaculture pool through the discharge port, the deflector plate acts to guide the discharged water approach the circumferential wall, thereby generating a circulating swirling flow rotating in tangential direction along the circumferential wall.

A filtering unit (1) for aquariums of the hang on back type comprising: a housing (6); a suction pipe (2) provided with a lower inlet (3); and a pump (5) integral with said housing (6) and configured to determine a water circulation through a recirculation path extended inside the filtering unit (1) between said inlet (3) and said outlet mouth (4), wherein a non-return valve (10) is advantageously provided upstream of the pump (5) to maintain a water volume necessary for priming the pump (5) itself.

A recirculating aquaculture system using a biofloc fermenter and aquaponics may include a breeding water tank that breeds farmed fish, a drum filter that filters breeding water drained from the recirculating aquaculture system; an automatic filtration system in which the breeding water of the drum filter is moved and purified; a biofloc fermentation system that supplies and mixes oxygen to backwash water of the automatic filtration system; and a plant cultivation system that cultivates plant with the breeding water mixed with stable and high-concentration oxygen moved from the biofloc fermentation system.

A recirculating aquaculture system using a biofloc fermenter and aquaponics may include a breeding water tank that breeds farmed fish, a drum filter that filters breeding water drained from the recirculating aquaculture system; an automatic filtration system in which the breeding water of the drum filter is moved and purified; a biofloc fermentation system that supplies and mixes oxygen to backwash water of the automatic filtration system; and a plant cultivation system that cultivates plant with the breeding water mixed with stable and high-concentration oxygen moved from the biofloc fermentation system.

A method for shrimp aquaculture, in which, all growth phases and essential operations are modularized and integrated to form a multi-phasic synchronous super-intensive shrimp production system controlled by a custom designed cyber-physical platform. Modular components include, for example, post-larvae nursery modules, grow-out production modules, recirculating aquaculture system (RAS) modules, feed distribution modules, and regulatory elements comprised of Program Logic Controllers (PLCs) integrated with Human Interface Modules (HIMs).

The present disclosure relates to an air lifting Venturi apparatus including a first inflow pipe extending in the form of a tube to guide inflow of water; a second inflow pipe extending in the form of a tube to guide inflow of air or oxygen; a Venturi pipe including a through passage having a neck portion having a diameter smaller than a diameter of an inflow port between the inflow port and an outflow port, wherein the first inflow pipe is connected to the inflow port and the second inflow pipe is connected to the neck portion; a spray nozzle connected to the outflow port of the Venturi pipe; and an air guide extending obliquely from an upper end of the Venturi pipe toward an upper portion of the spray nozzle in a spray direction.