Filter strip material on supply roller, for fish basins or aquaria or swimming pools, is of paper material with active ingredient powder(s) held in pores

摘要

A filter strip material (40), for fish basins or aquaria or swimming pools, is drawn through a reservoir from a supply roller (42). The filter material is a paper non-woven with one or more active ingredients in the pores, as powders applied by spray jets (50, 51).