Aquaria turned more broadly well-liked as houses had an electrical energy provide after World War I. Electricity allowed artificial lighting, as nicely as aeration, filtration, and heating of the water. Initially, amateur aquarists kept native fish ; the supply of unique species from overseas further increased the popularity of the Aquarium. Jugs produced from a wide selection of materials have been used to import fish from overseas, with a bicycle foot pump for aeration. Plastic delivery bags were introduced within the Nineteen Fifties, making it easier to ship fish. The eventual availability of air freight allowed fish to be efficiently imported from distant areas.
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