The present invention relates to an improvement in filtering apparatus including a filter device externally hitched on a wall surface of a aquarium for breeding aquarium fishes. The reception unit receives first data including supported and unsupported tags, and individual data added to the supported or unsupported tag. The processing means is further arranged to calculate a maximum value of the mean square displacement <rm2 from the autocorrelation function g as a function of time and the value of the property from said calculated maximum value of the mean square displacement rm2. The MnZn ferrite has basic components that comprise: ferric oxide : 51. The upper surface of the upper buffer layer and the lower surface of the lower buffer layer are respectively joined to a lead and a base through Pb-free solders having a thickness of not less than 0.