• Regenerable organic material resin adsorption for all marine & freshwater aquariums

  • Improves water quality & removes dyes and discoloration from water
  • Does not release adsorbed organic material once exhausted
  • Resin beads provide durability and excellent flow characteristics 
  • Regenerable over 250 times
  • Made in the USA


  • Brightwell Aquatics Organit-R improves water quality by removing latent dissolved organic material and encouraging higher oxidation-reduction potential(ORP, also known as “redox”). It removes dyes and discoloration from water, and will not release adsorbed organic material once exhausted. Organit-R is 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, and may be used in conjunction with, or as a replacement for, activated carbon. The synthetic polymer resin beads in Organit-R provide for durability and excellent flow characteristics. These beads are also regenerable over 250 times, dramatically increasing cost effectiveness.

  • Prior to first use, rinse resin under a stream of fresh water, then discard water. Used as directed, each 500ml of resin will help maintain water quality in 300 US-gallons. Resin will discolor with continued use, indicating exhaustion; regenerate once the resin becomes medium-brown in appearance. The original brightness of the resin may not be re-attained, however the resin will perform as well as before. Continued use and regeneration on a weekly basis will help reduce the prevalence of dissolved organic material and promotes good water quality; used in this fashion, the resin is effective for up to five years. To a point, effectiveness of resin is directly related to the reaction time it has with aquarium water: the longer the reaction time, the more effectively it will remove organic material. In all cases, the use of a mechanical pre-filter to remove particulate organic material from water prior to its interaction with this media will prolong effectiveness. Fluidized-bed filtration: follow instructions of filter manufacturer for optimal volume of media to use in reaction chamber; start at a low flow rate and adjust to keep media in a steady “churn” within lower 2/3 of chamber. Canister filtration: Load resin into filter as directed by manufacturer; regenerate as directed.


    Passive filtration: Place resin loosely in a 300μm mesh filter bag and move into an area of low- to medium-flow. Turning bag over once during usage will serve to shift the resin beads and increases effectiveness of this method.


    To regenerate: Dissolve 4 cups table salt in 1 US-gallon of room-temperature water per 250-ml of resin to be regenerated in a clean pail; place resin into pail and stir; allow beads to soak overnight; strain and rinse beads thoroughly in fresh water before reusing. Do not regenerate with bleach, which will damage the resin and could kill aquarium inhabitants.


    Caution: Keep out of reach of children. Not for human consumption.