Fish-growing aquarium

Claim 1

An aquarium device for the practical and economic growing of a massive quantity of fish in a minimum of space from fry or fingerlings to maturity, including a constantly running water supply therefor, with a slanted converging bottom to guide waste matter and other pollutants to an adjustable first discharge hole in the lower part of said aquarium, a screen supported across said aquarium on brackets along the side of aquarium to confine the fish to the higher levels and to prevent the fish from mixing the contaminant-laden water below with the fresher water above, an adjustable valve connected to first discharge flow hole to regulate the rate of discharge resulting from pressure of water above, a length of tubing extending down one side of aquarium to release air bubbles, pumped from a separate source, into the water occupied by the fish above the screen to aerate the water and to create circulation to aid in the deposit of contaminants, an upstanding intermediately located filter supported on the bottom of the aquarium to minimize the return of pollutants to upper levels, a shallow pan suspended from the top of one side of said aquarium beneath the surface of the water to hold food, a brace mounted on top of one side of said aquarium to hold a conventional aerator, a water level operated ball valve means to close said first adjustable discharge hole when water level in aquarium falls below a certain level, an auxiliary water tank attached to the side of the aquarium for control of water level in said aquarium having an overflow outlet and a siphon means connected thereto, said siphon means having an end remote from said auxiliary tank and in close proximity with the first discharge opening, and a second discharge outlet located adjacent to the first adjustable discharge flow hole.