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Seachem Onyx Sand Planted Aquarium Substrate 7.7 lb

Marsoni M251S
Sale price$15.99
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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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4.5 ★★★★★
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Marcia
West Palm Beach, US
★★★★★ 5
Quality product
Size: 26 Pcs for Roborock Saros 10R
Very nice quality replacement parts. Worth the money, also fast shipping from the seller.
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Reviewed in the United States on April 3, 2026
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Verified Purchase
aksman
Battle Creek, US
★★★★★ 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
K
Verified Purchase
Kevin K.
Chelsea, US
★★★★★ 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
M
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Mark Guillaume
Phoenix, US
★★★★★ 5
Great product
Size: 26 Pcs for Roborock Saros 10R
great
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Reviewed in the United States on February 3, 2026
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Verified Purchase
Diana Swift
Dallas, US
★★★★★ 5
Package as expected
Size: 26 Pcs for Roborock Saros 10R
Has everything you need for starter kit
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Reviewed in the United States on March 3, 2026

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