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Seachem Onyx Sand™
Reviews Views Date of last review
1 9624 Thu August 11, 2005
Recommended By Average Price Average Rating
100% of reviewers None indicated 10.0

Description: Onyx Sand™ is a specially fracted, stable porous gravel for the natural planted aquarium. Being carbonate rich, Onyx Sand™ provides an advantage to any plants able to utilize bicarbonates. Although ideally suited to planted aquaria, it may be used in any aquarium environment. Onyx Sand™ is most effective when used alone as an integral substrate bed, but it may be mixed with other gravels. Gravel modifiers such as laterite are not necessary. Onyx Sand™ is not chemically coated or treated but does have a slight buffering capacity that may raise pH by 0.1 - 0.5 pH units (depending on source water characteristics). Although pre-washed, it should be rinsed before use to remove residual dust. Dust can also be minimized by filling tank slowly and dispersing water so that the Onyx Sand™ bed is not disturbed. Slight initial cloudiness is normal and will clear rapidly (2–12 hours). This bag is sufficient for about a 5 cm (2 inch) deep bed in a typical 40 L (10 gallon) tank. Recommended use is 1 kg (2 lbs) for approximately each 200 cm2 (31 in2) of tank bottom at a depth of 5 cm (2 in).

Sizes: 7 kg (15.4lbs)

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Senior Member

Registered: April 2005
Posts: 404
Review Date: Thu August 11, 2005 Would you recommend the product? Yes | Price you paid?: Not Indicated | Rating: 10 

Pros: Easy to work with. Looks good.
Cons: More expensive than plain sand or gravel

I\'ve only used three substrates plain gravel, fluorite and Onyx sand. This is far and away the easiest to work with for plants. It was easy to rinse and set up with minimal cloudiness. It is easy to plant in and it doesn\'t get cloudy at all when you work in it. I like it.
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