Onyx Gravel ™ is a specially fracted porous substrate for the aquarium. Onyx Gravel™ is suitable for any aquarium environment including reef and planted aquariums. Onyx Gravel™ 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 Gravel™ is not chemically coated or treated but does have a slight buffering capacity. Also available as sand.

5-10 mm average size

Sizes: 7 kg bag
 
Concentration of nutrients in Onyx Gravel™
Aluminum
822
Barium
5
Calcium
197500
Cobalt
4
Chromium
10
copper
4
Iron
2846
Potassium
417
Magnesium
115400
Manganese
43
Sodium
135
Nickel
7
Vanadium
8
Zinc
23

Units=mg/kg, source: Plasma Emission Spectrometer, EPA Method 3050, Univ. of Georgia Chemical Analysis Lab
 
Want to know more?
Visit the Onyx Gravel™ FAQ
 

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Safety Information: Material Safety Data Sheet (MSDS)

 

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