An object of the present invention is a mat-like filtration material used to filter solid impurities contained in the rearing water of freshwater ornamental fish breeding in the aquarium, in particular, including the blue-green algae that frequently occur in the outdoor rearing, etc. of the summer, the entire solid impurities efficiently to provide a simple filtration materials and filtration device can interceptor. The A filtration material 10, a mat-like filter layer 11 to form a chemical fiber in felt-like, on the main surface 11a side of the one that, I provide a cotton cloth 15 in layers. Kas such as feces and food is efficiently interceptor at mat-like filter layer 11. In addition, in order to provide a layer of interceptor is highly effective cotton cloth 15 of the blue-green algae to the filter material 10, blue-green algae is efficiently interceptor in this cotton cloth 15. For this reason, the filtering material and the only mat-like filter layer, to which is laminated polyester woven fabric, as compared to the use but combined with, the entire interceptor of solid impurities is carried out efficiently. Thus, longer time to replacement of the water is achieved. .BACKGROUND【課題】淡水観賞魚飼育用水槽中の飼育水に含まれる固形不純物を濾過するのに使用されるマット状の濾過材であって、特に、夏場の室外飼育等において多く発生するアオコを含め、固形不純物全体を効率的に阻集できる簡便な濾過材及び濾過装置を提供する。【解決手段】濾過材10を、化学繊維をフェルト状に形成するマット状フィルタ層11と、その一方の主面11a側に、綿布15を積層状に設ける。糞や餌のカス等は、マット状フィルタ層11にて効率的に阻集される。また、濾過材10にアオコの阻集効果が高い綿布15の層を備えるためで、アオコはこの綿布15にて効率的に阻集される。このため、マット状フィルタ層のみの濾過材や、これにポリエステル製織布を積層、併用したものの使用に比べると、固形不純物の全体の阻集が効率的に行われる。これにより、水の入れ替えまでの期間の長期化が図られる。【選択図】図1
