Innovative technological appliance is designed to guarantee cleaning waters of fishponds and aquacultures, including the deeper parts. The cleaning system will be with containers of ellipsoid shape to increase the surface. The size of the containers will be calculated based on the size of fishpond or aquaculture and on level of water pollution. The appliance carcass will be made from metal and covered with nontoxic waterproof material. The mesh with pore-size of 1 millimeter will be applied to cover the container carcass to keep pre-treated Daphnia inside. The pre-treated Daphnia with activated resistance inside the containers mean to remove all the viruses, pathogenic bacteria, fungi and toxic algae. Main function of containers is to protect fish from consuming intoxicated Daphnia. Fish will become ecologically more relevant for humans consumption. Since Daphnia magna is the biggest among all Daphnia species, if the fishpond is artificial and with no natural Daphnia community, then Daphnia magna will be applied to increase the volume of filtered water. For waterbodies and aquacultures with natural Daphnia community, Daphnia of the same specie will be applied to preserve the natural biodiversity of local zooplankton in case of any escape.

Innovative technological appliance is designed to guarantee cleaning waters of fishponds and aquacultures, including the deeper parts. The cleaning system will be with containers of ellipsoid shape to increase the surface. The size of the containers will be calculated based on the size of fishpond or aquaculture and on level of water pollution. The appliance carcass will be made from metal and covered with nontoxic waterproof material. The mesh with pore-size of 1 millimeter will be applied to cover the container carcass to keep pre-treated Daphnia inside. The pre-treated Daphnia with activated resistance inside the containers mean to remove all the viruses, pathogenic bacteria, fungi and toxic algae. Main function of containers is to protect fish from consuming intoxicated Daphnia. Fish will become ecologically more relevant for humans consumption. Since Daphnia magna is the biggest among all Daphnia species, if the fishpond is artificial and with no natural Daphnia community, then Daphnia magna will be applied to increase the volume of filtered water. For waterbodies and aquacultures with natural Daphnia community, Daphnia of the same specie will be applied to preserve the natural biodiversity of local zooplankton in case of any escape.

Provided are fish tank effluent sampling systems, e.g., for use in recirculating aquaponics systems, methods of using same for sampling effluent, and kits for assembling such an effluent sampling system.

Provided are fish tank effluent sampling systems, e.g., for use in recirculating aquaponics systems, methods of using same for sampling effluent, and kits for assembling such an effluent sampling system.

System for treating inner walls of aquatic basins, including at least one working head, a mobility assembly for moving the working head along a wall to be treated, the working head having a working disc arranged in a rotational manner and connected to a rotary shaft which can be driven by a disc motor, the working disc bearing a wall contact foam having a plurality of radial slots connecting the center of rotation of the disc to the periphery of the disc.

System for treating inner walls of aquatic basins, including at least one working head, a mobility assembly for moving the working head along a wall to be treated, the working head having a working disc arranged in a rotational manner and connected to a rotary shaft which can be driven by a disc motor, the working disc bearing a wall contact foam having a plurality of radial slots connecting the center of rotation of the disc to the periphery of the disc.

A water tank cleaning tool comprising an underwater air vacuum with separate air and water exhaust channels, allowing the user to vacuum and clean the tank substrate without removing water from the tank.

A water tank cleaning tool comprising an underwater air vacuum with separate air and water exhaust channels, allowing the user to vacuum and clean the tank substrate without removing water from the tank.

An integrated method for clearance, collection and capture of internal pollutants and algae at the bottom of a lake include the following steps: selecting areas where the pollution level is high, and organic or inorganic particulate matter is prone to accumulation and carrying out trenching operations at the bottom of the lake to form a plurality of traps; and removing the sludge and algae inside the traps and clearing the sediment inside the traps, for subsequent internal pollution control when the surface-layer sludge on both sides of the traps almost fills up the traps. This method makes use of the hydrodynamic disturbances of waves formed by natural wind energy and lake currents to continuously transport sludge with a high pollution level and a small specific gravity and algae in the surface layer of the lake bottom, which are rich in organic debris, to artificially built traps.

An integrated method for clearance, collection and capture of internal pollutants and algae at the bottom of a lake include the following steps: selecting areas where the pollution level is high, and organic or inorganic particulate matter is prone to accumulation and carrying out trenching operations at the bottom of the lake to form a plurality of traps; and removing the sludge and algae inside the traps and clearing the sediment inside the traps, for subsequent internal pollution control when the surface-layer sludge on both sides of the traps almost fills up the traps. This method makes use of the hydrodynamic disturbances of waves formed by natural wind energy and lake currents to continuously transport sludge with a high pollution level and a small specific gravity and algae in the surface layer of the lake bottom, which are rich in organic debris, to artificially built traps.