Seachem Onyx Sand Size:7kg Spectral Precision

Spectral Precision

With its integrated cord channel

Contrarily

Purigen is the highest capacity organic filtration resin on the market

Pump unit (motor) and power cord

Seachem Onyx Sand Size:7kg Spectral PrecisionDescription Onyx 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. Onyx Sand is most effective when