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  2. Portable water purification - Wikipedia

    en.wikipedia.org/wiki/Portable_water_purification

    The Portable Aqua Unit for Lifesaving (short PAUL) is a portable ultrafiltration-based membrane water filter for humanitarian aid. It allows the decentralized supply of clean water in emergency and disaster situations for about 400 persons per unit per day. The filter is designed to function with neither chemicals nor energy nor trained personnel.

  3. Aquarium filter - Wikipedia

    en.wikipedia.org/wiki/Aquarium_filter

    Water enters slits in the box, passes through a layer of medium, then exits through the airlift tube to return to the aquarium. These filters tend to only be suitable for small and lightly stocked aquaria. The sponge filter is especially useful for rearing fry where the sponge prevents the small fish from entering the filter.

  4. Organisms involved in water purification - Wikipedia

    en.wikipedia.org/wiki/Organisms_involved_in...

    Management of multi-species fisheries requires careful management and may involve a range of fish species including bottom-feeders and predatory species to limit population growth of the herbivorous fish. Rotifers. Rotifers are microscopic complex organisms and are filter feeders removing fine particulate matter from water. They occur naturally ...

  5. Portable Aqua Unit for Lifesaving - Wikipedia

    en.wikipedia.org/wiki/Portable_Aqua_Unit_for...

    Portable Aqua Unit for Lifesaving. Water backpack "PAUL". The Portable Aqua Unit for Lifesaving (short PAUL ), also known as Water Backpack is a portable membrane water filter developed at the University of Kassel for humanitarian aid. It allows the decentralized supply of clean water in emergency and disaster situations.

  6. Bluestreak cleaner wrasse - Wikipedia

    en.wikipedia.org/wiki/Bluestreak_cleaner_wrasse

    The bluestreak cleaner wrasse ( Labroides dimidiatus) is one of several species of cleaner wrasses found on coral reefs from Eastern Africa and the Red Sea to French Polynesia. Like other cleaner wrasses, it eats parasites and dead tissue off larger fishes ' skin in a mutualistic relationship that provides food and protection for the wrasse ...

  7. Water filter - Wikipedia

    en.wikipedia.org/wiki/Water_filter

    A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation, accessible drinking water, public and private aquariums, and the safe use of ponds and swimming pools .

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