Fish growing tank

Claim 2

A fish growing tank comprising means defining a tank with a nominal water level, means for water supply to the tank, means for evacuation of water comprising an adjustable overflow conduit connected to an evacuation hole in the bottom of the tank, and means defining a latticed dome having a height greater than the span across it located in the bottom of the tank with its top terminating substantially below said nominal water level height.

Claim 3

A fish growing tank comprising means defining a tank with a nominal water level, means for water supply to the tank, means for evacuation of water comprising an adjustable overflow conduit connected to an evacuation hole in the bottom of the tank, and means defining a latticed dome having a height greater than the span across it located in the bottom of the tank with its top terminating substantially below said nominal water level height.

Claim 4

A fish growing tank comprising means defining a tank with a nominal water level, means for water supply to the tank, means for evacuation of water comprising an adjustable overflow conduit connected to an evacuation hole in the bottom of the tank, and means defining a latticed dome having a height greater than the span across it located in the bottom of the tank with its top terminating substantially below said nominal water level height.

Claim 5

Tank in accordance with claim 1, wherein said dome is movable away from said evacuation hole and wherein said water evacuation hole and the evacuation pipe connected to it are sufficiently wide to allow the fish to pass therethrough.

Claim 6

Tank in accordance with claim 1 wherein a latticed feed-table is provided in a preselected free distance above said water level.

Claim 7

Tank in accordance with claim 3 wherein said feed-table is supported by swimmers.

Claim 8

Tank in accordance with claim 1 wherein a plurality of replaceable floors are provided in a height array within the tank.

Claim 9

Tank in accordance with claim 5 wherein said floors consist of gratings.

Claim 10

Tank in accordance with claim 5 wherein at least one well which extends from the bottom of the tank to the water level in it is defined by said tank and floors and is open for passage of fish from said floors.

Claim 11

Tank in accordance with claim 7 wherein said floors slope into said at least one well.

Claim 12

Tank in accordance with claim 7 wherein at least one of said wells is provided above said evacuating hole and surrounding said dome.

Claim 13

Tank in accordance with claim 7 wherein at least one of said wells is annular and surrounds said floors like a jacket.

Claim 14

Tank in accordance with claim 1 wherein said adjustable overflow consists of a pipe which is swivellable around a lower end thereof and further comprising means defining an evacuation channel for receiving discharges from the pipe.

Claim 15

Tank in accordance with claim 11 wherein said overflow pipe is surrounded by a down-pipe.

Claim 16

A fish growing tank comprising means defining a tank with a nominal water level, means for water supply to the tank, means for evacuation of water comprising an adjustable overflow conduit connected to an evacuation hole in the bottom of the tank, and means defining a latticed dome located in the bottom of the tank with its top terminating substantially below said nominal water level height, and sorting means within the evacuation channel consisting of a step grate with stepwise increasing widths and separated chambers for stepwise retaining fish of increasing size.

Claim 17

A fish growing tank comprising means defining a tank with a nominal water level, means for water supply to the tank, means for evacuation of water comprising an adjustable overflow conduit connected to an evacuation hole in the bottom of the tank, and means defining a latticed dome located in the bottom of the tank with its top terminating substantially below said nominal water level height, and sorting means within the evacuation channel consisting of a step grate with stepwise increasing widths and separated chambers for stepwise retaining fish of increasing size.

Claim 18

A fish growing tank comprising means defining a tank with a nominal water level, means for water supply to the tank, means for evacuation of water from the tank, and a plurality of replaceable floors in said tank stacked one above the other to comprise a multi-story fish growing tank for increasing the utilization of the water volume in said tank, said tank and floors coacting to define well means extending from the bottom of the tank to the water level in it for passage of fish from said floors, the cross sectional area of each floor being greater than that of said well means and less than that of said tank.

Claim 19

A fish growing tank comprising means defining a tank with a nominal water level, means for water supply to the tank, means for evacuation of water from the tank, and a plurality of replaceable floors in said tank stacked one above the other to comprise a multi-story fish growing tank for increasing the utilization of the water volume in said tank, said tank and floors coacting to define well means extending from the bottom of the tank to the water level in it for passage of fish from said floors, the cross sectional area of each floor being greater than that of said well means and less than that of said tank.