PROBLEM TO BE SOLVED: To provide a filtration device of a pond capable of giving further pleasure in a state of retaining effects capable of giving pleasure of appreciating cultured fish and peace of mind through the appreciation.SOLUTION: A plurality of filtration tanks 5 are arranged in many stages vertically above stored water in a pond 1. Stored water in the pond 1 is pumped with a submerged pump 10, is sprayed into the filtration tank 5 in an uppermost stage from a water spray pipe 9 provided above the filtration tank 5 in the uppermost stage and filtered, the filtered water circulates sequentially in the filtration tanks 5 in lower stages and filtered, and clean water is returned to the pond. A plant growth box 16 is provided which includes one edge facing the filtration tank 5 vertically between the filtration tank 5 in a lowermost stage and stored water surface of the pond 1 and the other edge overhanging from an outer periphery of the filtration tank 5 to a side along the stored water surface. The filtered water is fed into the plant growth box 16 and stored, and discharged to the pond 1 from many water discharge holes 19 formed in the other edge part of a bottom plate 17, so as to generate a flow of clean water in the plant growth box 16. Accordingly, the plant is water-cultured in the plant growth box 16.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】飼育魚を観賞する楽しみや、観賞によって心に安らぎ与えることができるという効果を保持する状態でさらなる楽しみを付与することができるようにした池のろ過装置を提供する。【解決手段】池1の貯水上に複数のろ過槽5を上下方向に多段に設け、池1の貯水を水中ポンプ10で汲み上げて、最上段のろ過槽5上に設けられた散水管9から最上段のろ過槽5内に散水してろ過し、そのろ過水を下段のろ過槽5内に順次流通させてろ過し、清澄水を池に還流させる。最下段のろ過槽5と池1の貯水面間に一端部がろ過槽5と上下で対向し、他端部がろ過槽5の外周から貯水面に沿って側方に張り出す植物生育箱16を設け、その植物生育箱16内にろ過水を送り込んで貯水し、底板17の他端部に形成された多数の排水孔19から池1に排水し、植物生育箱16内に清澄水の流れを生じさせて、植物生育箱16内で植物を水耕栽培する。【選択図】図1
