Abstract
No assignee for this patent application has been made. News editors obtained the following quote from the background information suppli ed by the inventors: "Silt accumulation in a pond increased at the rate of 10˜5 centimeters (cm) every year. Accumulation of feed residues, feces of fishes, an d feces of shrimps will cause eutrophication of water bodies. The hazards of eut rophication of water bodies to fishes and economic aquatic organisms are as foll ows: dissolved oxygen in the water bodies is very low and leads to death by suff ocation, and toxins released by algal death after algal bloom lead to the death of fishes.
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