• Advanced clarifier that improves water clarity & eliminates cloudy water in marine aquariums
  • Useful during parasite outbreaks by removing them from the aquarium
  • Provides mechanical filtration & protein skimming
  • Safe for use for all marine invertebrates, fish & macroalgae
  • Made in the USA


  • Poor water clarity can be caused by a number of types of suspended particulate material, which may themselves be caused by excessive nutrient concentrations, digging/burrowing/feeding activities of fish and/or motile invertebrates, excessive water flow directed at fine-particulate sediment, etc. Clarifi-SW clears cloudy water by utilizing the weak electrical charges of water-borne particles as a means of binding them; the resultant relatively-large (and heavy) particles are then: trapped by mechanical filtration, exported by protein skimming, and/or fall out of the water column onto the aquarium bottom, where they can be siphoned out of the system, if desired, by the aquarist. Clarifi-SW is a useful tool to immediately improve clarity in aquaria on public display.



    While Clarifi-SW offers a rapid solution to water cloudiness, it should not be seen as an alternative to long-term proper and sensible aquarium husbandry. If conditions within the aquarium system encourage chronic events of water cloudiness, then it will become necessary to determine, and subsequently address, the cause(s). Oftentimes, the use of an effective and well-maintained protein skimmer will help control water cloudiness; additionally, feeding aquarium inhabitants sensibly, limiting the use of organic-based supplements and additives, use of a high-quality synthetic aquarium salt blend, regular testing of important water parameters with accurate kits and/or meters, and performing water changes/replacing evaporation with purified water are all important aspects of marine aquarium husbandry.

  • Do not use in freshwater aquaria; instead, use Clarifi-FW. Extensive research in our facility has revealed that maximum performance in freshwater and saltwater aquaria is achieved with different active ingredients rather than with one ingredient that is compatible in both types of aquaria. The active ingredients in Clarifi-SW are incompatible with freshwater aquaria.



    Shake bottle prior to use. Do not "free pour" into aquarium, which may result in excessive, persistent cloudiness. Replace or rinse mechanical filtration material prior to use; when filtration media nears capacity (signified by a significant decrease in water flow through the exhaust of the power filter, or pooling of water above horizontally-situated filter pad material), replace or rinse it, and repeat as necessary. Skimmate production may change during the time that the flocculant is active in the system; check protein skimmer waste receptacle periodically after dosing of Clarifi-SW and empty receptacle as necessary.



    Recommended dosage is ~1-ml of Clarifī-SW per 10 US-gallons (37.9 L). Dilute up to 10-ml of Clarifi-SW per 8 fl-oz. or 250-ml of purified water and stir to disperse; gradually pour the resultant solution into the aquarium in an area of rapid water flow. Allow at least 12-hours for flocculation process to complete; re-apply in 24-hours if necessary. Maximum recommended usage is twice per 5 day period.



    Recurrence of cloudy water after Clarifi-SW has been employed to satisfactorily clarify water is an indication that issues referred to in Technical Background (opposite panel) may need to be addressed. The long-term successful care of aquaria relies upon the employment of sound husbandry principles. Clarifi-SW is not formulated to remedy water discoloration (e.g. "yellow" tint) caused by dissolved organic material; instead, employ activated carbon (e.g. Brightwell Aquatics Carbonit-P) and/or macroadsorptive resin (e.g. Brightwell Aquatics Organit-R) for this purpose.



    Caution: Do not use in freshwater aquaria. Keep out of reach of children. Not for human consumption.