Berkey BioFilm Drops

(3 customer reviews)

$34.00 $28.00

SKU: DROPS-BB Category:

Berkey BioFilm Drops have been scientifically engineered for use in defense of biofilm formation in ceramic water filters, carbon (charcoal) filters, and water storage containers.

Use Berkey Biofilm Drops to extend the shelf life of water being stored for up to 5 years. Using Berkey Biofilm Drops eliminates the need to rotate your stored water every 6 months and keeps your water fresh tasting and odor free.


You can test for residual ions in the water being stored by using the test kit enclosed with the drops. Berkey Biofilm Drops are a scientifically engineered and patented Copper-Silver ion solution that is safe and user-friendly.

With 10 + years of development and testing behind the technology, Berkey Biofilm Drops are designed as a pre-treatment to defend against microbiological growth and control of biofilm buildup in filters and water storage containers.


Berkey Biofilm Drops may be used with any type of filter media and work especially well with the Black Berkey purification elements.

Biofilm is a substance that forms readily in water filters, water distribution lines, water storage tanks, and any other aqueous environments. Biofilms form when bacteria begin to excrete a slimy, sticky substance that allows them to adhere to surfaces.

The biofilm mass can consist of multiple species of bacteria and may include fungi, algae, and protozoa. Various scientific studies have demonstrated that up to 99% of bacteria do not actually live in the water; they live in the bio-film (a living environment and culture medium for bacteria), leaving only 1% of bacteria that actually live in the water.

It is only these free-floating bacteria that are destroyed with traditional sanitizers such as chlorine, and bromine.

Berkey Biofilm Drops work by incorporating multiple barrier processes for inhibiting the growth and regrowth of biofilms, utilizing natural mineral ions of copper and silver in an ion technology along with other additives and complexants to synergistically aid in the control and precipitation of calcium, iron, minerals and scale where biofilm bacteria attach, form, feed and breed. 

Frequently Bought Together

Price for all:   $208.00

Berkey Biofilm Drops are simple to use and specially formulated for use in harvested rainwater containers, long-term storage water containers, and for use in emergency preparedness and disaster relief.

  • Treats 330 Gallons
  • Extends the time between element cleanings
  • May be used with any type of filter media but works best with Black Berkey Purification elements
  • Berkey Biofilm Drops are used for storing and maintaining pure, fresh water
  • Scientifically engineered and patented  Copper-Silver Ion solution in defense of biofilm-related bacteria in ceramic water filters, carbon (charcoal filters)  and water storage containers
  • Specially formulated for use in harvested rainwater containers, long-term storage water containers and use in emergency preparedness and disaster relief
  • May be used with any type of filter media but works best with Black Berkey Purification elements
  • Extends the shelf life of water being stored for up to 5 years
  • Eliminates the need to rotate stored water every six months and keeps your water fresh-tasting and odor-free
  • Simple and easy to use
  • Claims are based on independent testing and peer-reviewed scientific research and have not been reviewed or evaluated or approved by the EPA

3 reviews for Berkey BioFilm Drops

  1. Barbara Scramstad

    great product, did a lot of research on this and decided to make a purchase,
    very pleased so far!

  2. Theri King

    It will be awhile before I know if it is a good long term preservative for water storage, but it does a great job on the Berkeys for keeping the water fresh and keeping scale down. Found myself having to clean out the top of the Berkey at least once a week; the water would start to taste a little brackish and stale. Since using this, there’s been no such problem. Each container has A LOT of product and is very long lasting. Have a new neighbor who is also a fan of the Berkey and happily uses the product for the same reason.

  3. Jeff Hastings

    amazing, clean, fresh water

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