Expert Series Organics Adsorption Resin, 32 fl. oz, Kent Marine. Expert Series Organic Adsorption Resin removes organic pollutants, stain, and entrained toxic gases to provide a pure environment in marine and freshwater aquariums. Contains special form macroporous organics adsorption resins, and reduces or eliminates carbon usage. Does not remove trace minerals from the water as competing products and carbon do! Organic Adsorption Resin is regenerable over and over again. White beads turn to a light yellow or brown, indicating exhaustion and need for regeneration. Resin life is about 2 years of service.