| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water-cleaning apparatus capable of removing nitrates accumulated in rearing water and preventing water from stagnation by gushing water from the water-cleaning apparatus for both plain water and sea water. SOLUTION: A water outlet and a spring pipe are formed on a lid of a water-cleaning apparatus. An area for growing anaerobic microorganisms in the water-cleaning apparatus is enlarged and composed of several platforms.</p> |
