A reacting canister utilizing transparent optical fiber technology coated with a photo-catalyst and a plasmonic layer, including yttrium aluminum garnet nanoparticles, disposed between the optical fiber and the photo-catalyst to degrade off-flavor compounds in aquacultured aquatic life. The degradation of off-flavored compounds—including 2-methylisoborneol—can be significantly enhanced by increasing the surface area of the catalyst. Coating individual transparent optical fibers and aligning those fibers in a canister configuration allows the treatment of large volumes of water in portable and scalable reactors. Once the fluid is treated, the fluid is returned to the reservoir containing the aquacultured aquatic life.

Selected freshwater or saltwater aquaculture systems are processed for the automatic removal of waste, ammonia, and pathogens while controlling temperature, oxygen, and feed amounts for obtaining maximum growth and survival at maximum aquatic species densities. A core platform treatment technology removes ammonia by combining chlorine with the ammonia to form chloramines, which are removed by catalytic activated carbon at a downstream filter station. Processing also removes potential pathogens by sterilizing and electrifying the water. The technology utilizes ammonia, chlorine, oxidation-reduction potential (ORP), and flow sensors to electronically adjust the amount of chlorine needed to remove the existing ammonia. A control system utilizes temperature, dissolved oxygen, and image processing sensors to optimize heating, cooling, feeding, and aeration.

A pedicure, manicure, and massage spa water treatment system is described. The treatment system provides a container for containing spa treatment water and multiple fish, a spa water treatment container having a first spa water treatment section hydraulically connected to the container and a second spa water treatment section hydraulically connected to both the container and the first spa water treatment section, and a carbon reactor device. The spa treatment water hydraulically and sequentially flows from the container to the first spa water treatment section, to the second spa water treatment section, and subsequently to the container. An inlet of the carbon reactor device is in hydraulic communication with the first spa water treatment section and an outlet of the carbon reactor device being in hydraulic communication with the second spa water treatment section. Only a portion of the filtered spa treatment water contacts the carbon reactor device.

A vacuum airlift system for treating an aqueous effluent includes an upflow liquid portion, where the upflow liquid portion is configured to retain a fluid, and a fluid inlet, the fluid inlet being fluidly coupled with the upflow liquid portion, where the fluid inlet is positioned at about a bottom of the upflow liquid portion. The vacuum airlift system can also include a downflow liquid portion, where the downflow liquid portion is fluidly coupled with the upflow liquid portion, and a fluid outlet, the fluid outlet being fluidly coupled with the downflow liquid portion, where the fluid outlet is positioned at about a bottom of the downflow liquid portion. The vacuum airlift system can also include a plurality of aerators fed by one or more fluidic oscillators; the plurality of aerators being coupled to the upflow liquid column.

A microbial electrochemical cell is described herein. The cell includes an anode electrode disposed in an anoxic environment below a water surface. The anode receives electrons from anaerobic decomposition of organic matter or other reduced compounds by microbes in sediment below the water surface. The cell also includes a cathode electrode disposed in an environment at a higher electrochemical potential than the anoxic environment. The cathode is electrically connected to the anode to receive the electrons from the anode. A reference electrode is disposed in the environment at the higher electrochemical potential than the anoxic environment. A potentiostat is electrically connected to each of the anode, the cathode and the reference electrode and is configured to receive electrons from the anode and control distribution of the electrons to the cathode based on a potential difference between the anode and the reference electrode. Methods of remediating aquaculture sediment are also described.

Embodiments of the invention provide a tank assembly with a main housing enclosing an inner volume, and an outlet section positioned extending from one end of the main housing that includes a front cavity with an outlet volume and an adjacent outlet channel. Some embodiments include at least one removable filter configured to be inserted at least partially into main housing forming at least a filtered volume and a fluidly coupled main volume. Some embodiments include a removable tank baffle including at least one central channel and a plurality of baffle apertures. In some embodiments, the central channel is configured to be fluidly coupled to the outlet channel when the removable tank baffle is positioned in the main housing. Further, the plurality of baffle apertures are configured to be fluidly coupled to the outlet volume when the removable tank baffle is positioned in the main housing.

A fish tank includes a first water chamber for providing living space for fish; a second water chamber in fluid connection with the first water chamber with a grating therebetween. The openings of the grating are sized to keep the first water chamber and the second water chamber fluidly connected but prevent fish or other aquatic animals from entering the second water chamber. In an embodiment, a one-way valve allows water to flow out of the second water chamber and prevents water from flowing back into the first water chamber. A removable syringe with a plunger, a barrel and an orifice is provided such that when the orifice is connected to the one-way valve means and the plunger is pulled out of the barrel, water in the second water chamber flows into the barrel of the removable syringe through the one-way valve means.

A water treatment system for a recirculation aquaculture facility, related method and uses thereof are provided. The water treatment system included a water pre-treatment facility and a groundwater recharge arrangement, wherein the water treatment system forms a primary recirculation flow pathway when integrated with the recirculation aquaculture facility, thereupon effluent discharged from the recirculation aquaculture facility is sequentially directed through and back into the recirculation aquaculture facility via a water collecting circuit network to enter the recirculation aquaculture facility as an influent. The secondary recirculation flow pathway is formed internally within the recirculation aquaculture facility.

A vertically-stacked growing system includes vertical beams and horizontal shelves respectively arranged on different vertical levels, Each horizontal shelf has a length and a width, and includes horizontal structural supports coupled to at least some of the vertical beams, decking coupled to the horizontal structural supports, and multiple walls to form a shallow pond when the horizontal shelf contains a plant nutrient water culture, thereby constituting a growing layer of the growing system. The walls include two side walls along the length and two end walls along the width. Each horizontal shelf further includes a loading and/or unloading apparatus to facilitate loading and/or unloading of a plurality of rafts into and/or out of the shallow pond, via the two end walls, wherein respective rafts of the plurality of rafts include a plurality of germinated plants. At least a first horizontal shelf further comprises a raft conveyance system to move at least a first raft of the plurality of rafts through a first shallow pond contained in the first horizontal shelf.

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.