A light system for an aquarium includes an aquarium tank and a lid covering the open top of the tank. The lid is pivotably attached to the tank and is pivotable between a covered position and uncovered position. A light source is secured to an interior portion of the lid and moves with the lid between the covered position and uncovered position. The light source emits a. light beam. An alignment arrangement is provided for the light source and is constructed and arranged to ensure the light beam projects into the tank interior volume regardless of the position of the lid and light source.

A light system for an aquarium includes an aquarium tank and a lid covering the open top of the tank. The lid is pivotably attached to the tank and is pivotable between a covered position and uncovered position. A light source is secured to an interior portion of the lid and moves with the lid between the covered position and uncovered position. The light source emits a. light beam. An alignment arrangement is provided for the light source and is constructed and arranged to ensure the light beam projects into the tank interior volume regardless of the position of the lid and light source.

A light engine that produces UVA1 light, but not UVA2 or UVB radiation, that will provide a human or animal subject a beneficial application of artificial UVA1 light without the deleterious effect of the UVA2 and UVB light. Methods of providing UVA1 light to the human or animal subject over various periods of time provide positive treatments that can reduce stress, reduce anxiety, increase a pain threshold, and induce interferon production. Exposure to UVA1 wavelength light (360-400 nm) provides a positive effect on both humans and animals. This is especially true when the humans or animals do not receive UVB and UVA2 at the time that the UVA1 light is received, and the ratio of UVA1 light to (UVA1 light+visible light) is greater than 10%.

The present disclosure proposes an improved apparatus and method for counting of sea lice by providing a stable and controlled light environment which ensures counting of sea lice reliably and independent of weather conditions and an optimized spectral power distribution and intensity of the light for improved observation (detectability) of sea lice with respect to fish skin. An embodiment of the disclosed light system comprises multiple LEDs, at least two LEDs providing a light colour with peaks in the range 490-540 nm (Cyan/Green) respectively 620-660 nm (Red).

The present disclosure proposes an improved apparatus and method for counting of sea lice by providing a stable and controlled light environment which ensures counting of sea lice reliably and independent of weather conditions and an optimized spectral power distribution and intensity of the light for improved observation (detectability) of sea lice with respect to fish skin. An embodiment of the disclosed light system comprises multiple LEDs, at least two LEDs providing a light colour with peaks in the range 490-540 nm (Cyan/Green) respectively 620-660 nm (Red).

An aquarium filtering and purifying system includes an upper display tank and a lower filter tank. The water from the upper tank can be delivered to the lower tank to a filter, such as within a surrounding filter fabric or membrane, such as a filter sock. An air tube can also be inserted into the filter tank to an unfiltered side of the filter, such as within the filter sock, to deliver air bubbles into the filter tank. The air tube can have an air stone at the end thereof to diffuse the air bubbles. Further air stones can be provided on an outside of the sock in the first compartment. Filtered water is delivered to a second compartment in the filter tank. The next compartment can have sand, and/or rocks and/or algae and/or a clean-up crew to assist in purifying the water. Water from the second compartment then passes to a third compartment, through a bubble trap, and then is pumped back to the display tank. Alternatively, the first compartment can be provided with a macro algae bed instead of a filter sock.

A larvae counter comprising a first container for receiving water, eggs of insects and/or larvae, a second container in fluid communication with the first container for receiving water and larvae from the first container, and a larvae counting module in fluid communication with the second container for receiving water and larvae from the second container and counting the larvae.

Peristaltic dosing pump including a pump housing, a dosing head, and a manual tool-less clamping arrangement for repeated detachable clamping of the dosing head on the pump housing. Reef aquarium LED array illumination units having a planar LED array for emitting illumination and a 3D stadium lens centrally mounted with respect thereto and underlying same for projecting a generally homogenous spectrum, diverging generally stadium shaped illumination beam.

Disclosed are livewell systems and methods of operating livewell systems. A livewell system may include a livewell tank having a chamber formed therein, a fill sensor configured to detect a fill level of the chamber, an intake pump configured to selectively convey water into the chamber, and a control unit including a processor and a memory storing instructions. The processor may be configured to execute the instructions to receive a fill signal, determine whether the chamber is filled to a predetermined fill level; and in response to the fill signal and a determination that the chamber is not filled to the predetermined fill level, cause the intake pump to convey water into the chamber.

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.