Regenerable Dissolved Organic Material Adsorption Resin for all Marine & Freshwater Aquaria. Overview Improves water quality by removing latent dissolved organic material and encouraging higher oxidation-reduction potential(ORP, also known as “redox”). Removes dyes and discoloration from water. Will not release adsorbed organic material once exhausted. Ideal for use in small (e.g. “nano”) aquaria where a protein skimmer is not feasible. Does not actively remove trace, minor, or major elements from aquarium. May be used in conjunction with, or as a replacement for, activated carbon. Synthetic polymer resin beads provide for durability and excellent flow characteristics; may be employed in fluidized-bed, canister, or passive filtration. Regenerable over 250 times, dramatically increasing cost effectiveness.