Seachem Onyx Sand FPP AlgaeFix is specially formulated for

AlgaeFix is specially formulated for use in ponds and aquariums containing live plants and fish

To remove cloudiness

odors and discoloration from aquarium water

and freshwater aquariums

so you can add fish to your aquarium (or add them back after a water change) immediately

Seachem Onyx Sand FPP AlgaeFix is specially formulated forOnyx Sand is a naturally dark gray 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. Premium natural sand for the planted aquarium