


Seachem Onyx Sand Planted Aquarium Substrate 7.7 lb
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Seachem Onyx Sand Planted Aquarium Substrate 7.7 lbOnyx Sand is a naturally dark gray sand that perfectly complements and enhances the appearance of any aquarium. It supports optimal KH levels for freshwater planted aquariums. 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
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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Quality product
Size: 26 Pcs for Roborock Saros 10R
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Reviewed in the United States on April 3, 2026
★★★★★ 5
Great for Robodock
Size: 26 Pcs for Roborock Saros 10R
Works great for my Robodock.
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Reviewed in the United States on May 11, 2026
★★★★★ 5
great value
Size: 26 Pcs for Roborock Saros 10R
good value for money
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Great product
Size: 26 Pcs for Roborock Saros 10R
great
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★★★★★ 5
Package as expected
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