Matches 51 - 58 out of 58 < 1 2


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4067809 Filtering system for fish-farming water  
A filtering system is disclosed for effectively filtering the water of aquariums for tropical or salt-water fish, the water of fish-farming ponds, and/or any other type of fish-farming water. The...
4052960 Fish rearing system  
A fish rearing system. The fish rearing system includes a rearing tank, filtration means and means to recycle water in the system. The system includes an ozone contact unit in which, when the...
4028245 Arrangement for conversion of foreign matter contained in water  
An arrangement for converting foreign and harmful matter found particularly in sewage water, in which the foreign matter is converted into harmless materials. A conversion tank with an intake for...
3973519 Screening device in a closed-loop aquaculture system  
This invention is a screening apparatus for retaining small marine animals in a growing container connected to closed-loop aquaculture system. The screening apparatus comprises (a) a first plate;...
3957017 Contaminant filter in a closed-loop aquaculture system  
This invention is drawn to the use of an open-cell, polyurethane foam to remove dissolved contaminants from water in an aquaculture system. The foam is made by suitably reacting a hydroxylated...
3842804 FISH-REARING FACILITY  
Water is withdrawn from a fish rearing tank by an air lift pump to a tank alongside the pond. Part of such water may be returned to the tank through aeration sprays. The balance of the water...
3661262 FILTRATION AND CIRCULATION SYSTEM FOR MAINTAINING WATER QUALITY IN MARICULTURE TANK  
A filtration and circulation system for maintaining the water quality in a fish tank favorable for promoting the production and growth of fish therein and for circulating water therethrough at a...
3155609 Stabilization of a closed or open water system through the selective utilization of light  
Matches 51 - 58 out of 58 < 1 2