Seachem Flourish Epoxy Grey is a two-component epoxy putty designed for hardscaping in planted aquariums, allowing you to firmly anchor materials like rocks and driftwood for enhanced stability. It offers a quick 5-minute working time and completely hardens, whether underwater or out of water, within 24 hours. This product is perfect for securing rock formations, preventing potential collapses that could harm plants or the aquarium. When used according to instructions, Flourish Epoxy is entirely safe for all aquarium residents. Find it at MorphMarket for your aquascaping needs.