Seachem Onyx Gravel 7kg Global recommendation carbonate hardness

carbonate hardness

this helps create a lovely warm and sunny feel to the aquarium

adjustable flow

Use at start-up and whenever adding or replacing water

Mano Base enables optimal plant growth and reduces algae blooms

Seachem Onyx Gravel 7kg Global recommendation carbonate hardnessOnyx is a specially fracted natural substrate for the aquarium. Onyx is suitable for any marine or freshwater environments and is ideally suited for Cichlid environments. Onyx is most effective when used alone as an integral substrate bed, but it may be mixed with other gravels or sands such as Onyx Sand. Onyx is not chemically coated or treated but does have a slight buffering capacity. Set up Although it is pre washed, because Onyx is a natural