Seachem Onyx Sand 7Kg Aquarium Substrate

Seachem Onyx Sand 7Kg Aquarium Substrate

Marsoni

M251S

$21.99

Get it in 3 business days with 1 day shipping. Friday, May 29

Seachem Onyx Sand 7Kg Aquarium SubstrateSeachem Onyx Sand is a naturally dark grey sand that perfectly complements and enhances the appearance of any aquarium. It provides not only iron and other minerals but supports optimal KH levels for freshwater planted aquariums. 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. Seachem Onyx Sand is most effective

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Honestly I didn't think this ball would last but 2 years later and only one battery change later and it is going strong. This ball has given me so much more time to play with my dog since I can throw the ball at night on short winter days I can't recommend it enough. I can throw the ball at night and my dog can find it in the dark. Add a collar LED and it's a funny light show of one light intercepting another.

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Reviewed in the United States on February 26, 2026