Removes unpleasant residue and odors. Non-toxic and easy to use. The naturally occuring bacteria neutralizes odor fast and breaks down organic, land hermit crab waste. Discourages toxic ammonia build-up in hermit crab water. Improves hygiene of hermit crab water and sand. Keeps land hermit crab's home smelling fresh and clean. br/>Sold in Quantity of: 1