Two Little Fishies Refugite for Refugium Filters is a live mineral-rich sand for refugiums and seagrass displays, for mangroves, and for LPS corals such as Goniopora, Trachyphyllia, and Acanthophyllia. Refugite promotes natural denitrification, adsorbs phosphate, and can be regenerated. It"™s packed live with BioPronto too.