| http://www.w3.org/ns/prov#value | - SKAustin 05-27-2007 01:13 PM A sump is, in the simplest of terms, a seperate tank, below or beside the main display tank, used to hide equipment such as heaters, skimmers, monitoring probes, ect. trreherd 05-27-2007 03:19 PM Can be used to house a refugium, deepsand bed, and to add more water volume to your system.
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