Rids hair & sludge from corals & invertebratesFirst time usage will usually treat 50 gallons Maintenance usage will treat 200 gallons Betters your aquatic environment & experience. No one likes the look of dirty looking fish or corals. This can become super frustrating to maintain or get rid of; however, The UltraLife Hair & Sludge Removal System is a simple solution that rids this unflattering hair and sludge from your corals and invertebrates in your marine or reef aquarium. This formula does not harm fish, invertebrates, desired macro algae, corals or reef inhabitants. First time usage will treat 50 gallons, where as maintenance usage will treat 200 gallons. Help better your aquatic environment for a more enjoyable hobbyist experience.