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Hand-held battery-operated aquarium gravel cleanerVacuums aquarium gravel to prevent waste buildupKeeps aquarium gravel clean without removing waterQuick and thorough removal of sludge and dirt layers in aquarium gravel. The Eheim Sludge Extractor removes detritus without taking out water. Powerful and maintenance-free suction pump loosens gravel layer so the sludge is churned up and drawn into the suction system. Useful bacteria remain undisturbed in the lower part of the gravel bed. Uses 4 AA batteries (included). For best results, operate the Eheim Sludge Extractor at a maximum aquarium water depth of 23-1/2 inches and a minimum depth of 8 inches. For use in fresh or saltwater aquariums. The Eheim Sludge Extractor Measures 2-1/2" x 24" high.Please click on "More Information" for directions for use.

Both ends of these couplings feature slip fittings. Available sizes include 1/2" x 1/2", 3/4" x 3/4" and 1" x 1".

Both ends of these couplings feature slip fittings. Available sizes include 1/2" x 1/2", 3/4" x 3/4" and 1" x 1".

Both ends of these couplings feature slip fittings. Available sizes include 1/2" x 1/2", 3/4" x 3/4" and 1" x 1".

Bushings are slip outside by slip inside.

Bushings are slip outside by slip inside.

Bushings are slip outside by slip inside.

Bushings are slip outside by female pipe threaded inside.

Bushings are slip outside by female pipe threaded inside.

Bushings are slip outside by female pipe threaded inside.