Provide your invertebrates with the ultimate calcium boost using this 100% natural, pesticide-free cuttlefish bone. It is packed with vital calcium and minerals that detritivores need to build their exoskeletons and moult without issue. As a permanent mineral station on the habitat floor, it allows critters to naturally scrape off micro-particles that support healthy egg-laying and cell function. To ensure complete safety, the bone is boiled at 100°C to strip away unwanted marine salts and harmful pathogens. This leaves behind a perfectly clean, mineral-rich core ready to be safely broken down by the beneficial microbes and clean-up crew in the soil.