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Onyx is a specially fracted porous substrate for the aquarium. Onyx is suitable for most marine and freshwater environments including reef and planted aquariums. Onyx is most effective when used alone as an integral substrate bed, but it may be mixed with other gravels or sands. Gravel modifiers are not necessary. Onyx is not chemically coated or treated but does have a slight buffering capacity.
Is Discontinued By Manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 17 x 11.75 x 1.75 inches; 15.43 Pounds
Item model number ‏ : ‎ 3705
Date First Available ‏ : ‎ June 15, 2004
Manufacturer ‏ : ‎ Seachem Laboratories, Inc.
ASIN ‏ : ‎ B0002A5XUA
Country of Origin ‏ : ‎ USA

Suitable for any marine or freshwater environment and is ideally suited for Cichlid environments
Most effective when used alone as an integral substrate bed, but may be mixed with other gravels or Sands
Not chemically coated or treated but does have a slight buffering capacity

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