A high quality pleco cave is made of clay firing at high temperature. This makes pleco cave absolutely safe for people, aquarium fish and pets. Pleco caves can be used for reproduction many kinds of plecos such as Ancistrus (Bristlenose pleco), Hypancistrus, Peckoltia and many others. Dimensions are selected based on our 10-year experience in breeding Plecos. Just flush the aquarium cave in tap water before use. We pay great attention to design. This allows our pleco caves to fit organically into any fish tank. Also pleco cave can be used as shelters for various Cichlids and Shrimps.