A delivery device and system to supplement CO.sub.2 in an underwater environment without the need for electricity or the use of compressed CO.sub.2. The device consists of a container containing a biological organism such as mycelium and including an exit portal for CO.sub.2 to enter the underwater environment. The device may also incorporate a separation device to delay and control the flow of CO.sub.2. The system requires the device to be held in place through a securing point in the underwater environment. The minimum requirements for the device are described, but in certain instances it will be preferably used with a double-bag or an outer shell housing to protect or aesthetically conceal the placement underwater. The use of this device and system to supplement carbon dioxide in water will span many industries and applications. It will assist with mosquito trapping. It will also supplement CO.sub.2 in underwater growing environments.

A delivery device and system to supplement CO.sub.2 in an underwater environment without the need for electricity or the use of compressed CO.sub.2. The device consists of a container containing a biological organism such as mycelium and including an exit portal for CO.sub.2 to enter the underwater environment. The device may also incorporate a separation device to delay and control the flow of CO.sub.2. The system requires the device to be held in place through a securing point in the underwater environment. The minimum requirements for the device are described, but in certain instances it will be preferably used with a double-bag or an outer shell housing to protect or aesthetically conceal the placement underwater. The use of this device and system to supplement carbon dioxide in water will span many industries and applications. It will assist with mosquito trapping. It will also supplement CO.sub.2 in underwater growing environments.

A seaweed aquarium feeder and method allows fish to feed on seaweed food while preventing escape of the food into aquarium water. The feeder includes a base and hinged lid which closes against the base. The lid includes a rectangular recessed seaweed holding windowed area which fits over a protruding rectangular platform of the base. Seaweed food is cut or folded into rectangular sheets captured between the recessed seaweed holding windowed area of the lid and the protruding platform of the base. Windows in the lid allow the fish access to the seaweed food while covering edges of the folded or cut seaweed to prevent tearing off pieces of pieces of the seaweed which may clog an aquarium filter. A magnet pocket in the base holds a first magnet the feeder is held against an aquarium wall by cooperation of the first magnet with a second magnet outside the aquarium.

A seaweed aquarium feeder and method allows fish to feed on seaweed food while preventing escape of the food into aquarium water. The feeder includes a base and hinged lid which closes against the base. The lid includes a rectangular recessed seaweed holding windowed area which fits over a protruding rectangular platform of the base. Seaweed food is cut or folded into rectangular sheets captured between the recessed seaweed holding windowed area of the lid and the protruding platform of the base. Windows in the lid allow the fish access to the seaweed food while covering edges of the folded or cut seaweed to prevent tearing off pieces of pieces of the seaweed which may clog an aquarium filter. A magnet pocket in the base holds a first magnet the feeder is held against an aquarium wall by cooperation of the first magnet with a second magnet outside the aquarium.

Apparatus and methods for automatically feeding fish at predetermined intervals are disclosed herein. An automatic fish feeder can include a housing, at least one cover, a feeding track, and a valve. The housing can include a peripheral outer cover and at least one access hole. The food storage reservoir can be connected to the housing and configured to be accessible by an access hole. At least one cover can be removably attached to the peripheral outer cover and substantially seal the food storage reservoir. The feeding track can be coupleable to the food storage reservoir and configured to receive and distribute food from the food storage reservoir at individual rates. The valve can be coupleable to the feeding track and configured to control the flow of food from the feeding track. The valve can include a rod and a counter configured to move the rod relative to the feeding track.

Apparatus and methods for automatically feeding fish at predetermined intervals are disclosed herein. An automatic fish feeder can include a housing, at least one cover, a feeding track, and a valve. The housing can include a peripheral outer cover and at least one access hole. The food storage reservoir can be connected to the housing and configured to be accessible by an access hole. At least one cover can be removably attached to the peripheral outer cover and substantially seal the food storage reservoir. The feeding track can be coupleable to the food storage reservoir and configured to receive and distribute food from the food storage reservoir at individual rates. The valve can be coupleable to the feeding track and configured to control the flow of food from the feeding track. The valve can include a rod and a counter configured to move the rod relative to the feeding track.

In an illustrative embodiment, a feeder may be comprised of a body, a lid, and a cover. A food sheet may be engaged with an exterior portion of the body and a cover may be positioned over the food sheet, such that the food sheet is positioned between the body and the cover. A lid may be engaged with a terminal end of the body to secure the relative position of the cover with respect to the body.

In an illustrative embodiment, a feeder may be comprised of a body, a lid, and a cover. A food sheet may be engaged with an exterior portion of the body and a cover may be positioned over the food sheet, such that the food sheet is positioned between the body and the cover. A lid may be engaged with a terminal end of the body to secure the relative position of the cover with respect to the body.

An aquatic feeder. The aquatic feeder includes a first portion connected to a second portion. The first portion is made of a material floatable in water. The second portion includes a sidewall defining an internal cavity. At least one aperture is formed through the sidewall. A divider is disposed in between the first portion 18 and the second portion and acts as a cap for the internal cavity of the second portion. The internal cavity is configured to retain an aquatic animal food. The at least one aperture is configured to release the aquatic animal food when the at least one aperture is submerged in water.

A self-harvesting sustaining feed system includes a tank for housing fish, a frame located above the fish tank, one or more plant floats which float atop water within shelves held by the frame, and an insect tray for housing larvae. Temporary temperature changes in the insect tray cause the larvae within the insect tray to migrate out and fall into the fish tank below.