Elga Labwater Cartridge L1 Di Unit EA. A common method of obtaining these particular minerals is by using clay as a raw material. Natural clays contain silica alumina and other inorganic salts which have a very low specific gravity and thus lower extraction yields. Natural silica is also commonly used as an agar enhancer and buffer in digestion procedures. Experienced users report that the color change in the sand medium is a clear sign of an efficient extraction process. Specifications for Elga Labwater Cartridge L1 Di LC174: Catalog number: 89204-382 Type: INST/EQUIP 0-499 Description: CARTRIDGE L1 DI Supplier Number: LC174 Package Contents: Elga Labwater Cartridge L1 Di LC174 / 89204-382 The Elga Labwater Cartridge L1 Di LC174 is a quality addition to the Elga Labwater lineup. For more great deals on Laboratory Apparatus by Elga Labwater please browse our Elga Labwater Laboratory Apparatus page. Elga Labwater Cartridge L1 Di LC174 Unit EA