Seachem Onyx Gravel Size:7kg non-toxic materials for long-lasting use

non-toxic materials for long-lasting use and easy cleaning

tight quilting stitch designed with nylon rip-stop backing

Essential for damaged

5 kg 1½ 1¾

Designed for the most enthusiastic chewers

Seachem Onyx Gravel Size:7kg non-toxic materials for long-lasting useOnyx 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. Although it is pre washed, because Onyx is a natural product, it