Seachem Onyx Sand 15.4lb Marina non-toxic and non-pathogenic

non-toxic and non-pathogenic

Good planting weight

Most suction cups applied in saltwater tank become stiff with time

1 block 250 gal

Seachem Onyx Sand 15.4lb Marina non-toxic and non-pathogenicPremium natural sand for the planted aquarium Good for the life of the aquarium Supports optimal KH levels for freshwater planted aquariums Rich in carbonates Overview Onyx 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