Family-Owned, Top Quality Materials, Innovative Designs, Powerful Results!

Gravity Feed Filters – Aquametix & Cerametix – For City Or Well Water – *BOTH IN STOCK!*


(67 customer reviews)

Aquametix and Cerametix gravity feed filters offer exceptional-performance backed by extensive third-party lab testing (linked below.) Both filter options are proudly made in the USA and are compatible with Berkey units.

Filter Descriptions

  • Aquametix – Broadband contaminant removal including difficult to remove contaminants such as nitrates and fluorides.  Features 10 micron filtration for a faster drip rate. Recommended for: CITY WATER.
  • Cerametix –  Broadband contaminant removal including difficult to remove contaminants such as nitrates and fluorides. Features a diatomaceous earth ceramic outer shell which filters out fine sediment and microbes down to .2 microns with a slower drip rate. Washable outer shell. Recommended for: WELL/WILD/RAW or CITY WATER.
  • (Optional) Mineral Enrichment Bag – Mineral bag is placed in the bottom reservoir of your gravity feed system to increase pH and provide beneficial health enhancing minerals. Minerals contained are a blend of Zeolite, Magnesium Oxide, Calcium, and Carbon. (Please note: Our filters never remove source minerals from your water, this is an option for those who prefer further mineral enhancement.)


Filtering Capacity info can be found by scrolling down to the info section below.


Important Notes Regarding Cerametix and Aquametix Filters:

  1. Installation Instructions: Our filters are designed for installation in the top reservoir of your gravity feed system, completely replacing all existing filters. Additionally, you have the option to place an optional mineral enrichment bag in the bottom reservoir.
  2. Filter Compatibility: Please avoid mixing different filter types. Using only one type of filter in your system is recommended for optimal performance.
  3. Handle with Care: Cerametix Filters are delicate and should be handled with care. Avoid dropping, jostling, or overtightening, as these actions may result in breakage.
  4. Avoid Red Dye Tests: Refrain from conducting red dye tests on these filters, as it can significantly reduce the filter’s lifespan.
  5. Initial Usage: Both filter types may require the passage of at least 2-4 reservoirs of water through them, or possibly more, to eliminate any initial taste associated with new filters. Any lingering “new filter” taste is harmless, and the water can be safely consumed after the initial priming process is completed as directed.
  6. No Priming Required: There is no need for priming these filters before use.
  7. Activated Alumina: Please note that Aquametix and Cerametix filters do not contain activated alumina, unlike Berkey filters.
  8. Price Includes: Your purchase includes two replacement filters.


Manufactured in America.





*Laboratory tests are conducted under controlled conditions and may not always accurately represent real-world scenarios. The effectiveness of contaminant removal may vary depending on the quality of the water source. These tests provide insights into the filtration capabilities of these products, serving as a reference point for potential performance.

Follow the link to learn how to further improve the health benefits of your water with structuring and energizing: Handheld Water Vortexer




In lab tests, Cerametix showed a 97.5% fluoride reduction rate, Aquametix showed a 99.99% fluoride reduction rate. The Nano-Fiber filter has not yet been tested for fluoride removal. 


The Cerametix filters will last approximately 8 months with 2 filters (500 gallons per filter.) Aquametix filters will last approximately 1 year with 2 filters (750-1000 gallons per filter). Nano-Fiber filters will last approximately 1 year with 1 filter (2500 gallons.) Please note, replacement time will vary based on water dynamics/usage.


If filters will be unused for an extended period of time, empty the reservoir of water and remove the filters. Rinse them, let them dry, and store them in a cool, dark place. When you’re ready to use them again, simply rinse them and re-install. Re-priming is not needed. 


Red-dye tests are not recommended as they are ineffective and will damage the filters, potentially making them unusable. Strip tests can be purchased and used to gauge when replacement is needed. 


Our Cerametix and Aquametix filters are certified by NSF and have been 3rd party tested. The Nano-Fiber has been third-party tested and meets or exceeds NSF standards, however it has not been certified by NSF. Both filters are IAPMO certified and third party EPA certified lab tested.

67 reviews for Gravity Feed Filters – Aquametix & Cerametix – For City Or Well Water – *BOTH IN STOCK!*

  1. Samantha M. (verified owner)

    These filters fit inside my berkey setup perfectly. The water tastes so fresh and crisp and clean, will definitely repurchase!

  2. Anna (verified owner)

    We love our filter so far! The water tastes much better than other filters we have tried. Easy installation, fast filling of the reservoir, we could not be happier

  3. nancy p. (verified owner)

  4. Charles Dietrich (verified owner)

    Customer service that is above and beyond excellent! The products are fantastic and they run the business with integrity and excellence. I will be a loyal customer for life.

  5. April C. (verified owner)

    Customer service is too notch. One unit arived broken, called customer service and within two days I had a replacement.

    Products works better then expected.

  6. Carla (verified owner)

    Thank you! We love your products and your customer service.

  7. Nash (verified owner)

    Great quality filters, better than the standard Berkey filters.

  8. Raed Atoui (verified owner)

  9. Abigail A. (verified owner)

    Works easily in our Big Berkey and our water tastes great!

  10. Julie S. (verified owner)

    Quick shipping, easy to install, and great customer service when I reached out with questions. So far I am very happy with the product and would recommend!

  11. Anonymous (verified owner)

  12. Marissa (verified owner)

    We love our filter so much! Our water tastes amazing. But even more so I was so impressed by Greenfield’s customer service. So happy we chose to switch to Greenfield products!

  13. Keely (verified owner)

    Love love love this filter & the minerals! We will be customers for life! The taste between our city water, another popular brand and Greenfield is noticeably better tasting. My whole family drinks more water now! Thank you!

  14. Hannah (verified owner)

    Love this filter so much!!

  15. Sarah C. (verified owner)

    I am totally pleased with this filter replacing my berkey. The customer service was also top notch!

  16. Judy S. (verified owner)

    So grateful to have been made aware of the issue and found these fikters as the remedy! Working as expected and a huge improvement!!

  17. Aidil Wasielewski (verified owner)

    Water quality is amazing! we are loving it

  18. Jeremy (verified owner)

    Just ordered replacement filters and the mineral addition. This was my first replacement filters; my previous ones lasted me a little over 2 years with a family of 3. I originally bought this to make sure Mama and baby were getting the smartest water I could find for them. I replaced the filters for the same reason. BTW, these were nice to have with all the boil notices we got 2 winters ago around Austin.

  19. Maria (verified owner)

  20. Meagan T. (verified owner)

    I bought the aquametix and cerametic filters for my Berkey. Awesome products. Awesome service. I also have the handheld vortexer. Nothing like some good structured water! Greenfield water solutions really stands by their products and has your back if you have any difficulties. Highly recommend!

  21. Rachel Huntington (verified owner)

    Love that it is full but not taste

  22. Anonymous (verified owner)

    Love the filters. Will buy again

  23. Anonymous (verified owner)

    Such a great product. You can really tell a difference

  24. Katelyn Munger (verified owner)

    We have finally found our water solution with these filters in our gravitational water system. Our water now tastes and feels full of life, quenching our thirst, nourishing our bodies and tasting like water from a natural spring. Thank you kindly!

  25. Rachelle (verified owner)

    Easy to install!

  26. Anonymous (verified owner)

  27. Elisabeth L. (verified owner)

    Great communication from company and we are very happy with our new filters. We definitely notice a difference from our old ones!

  28. Rachel (verified owner)

    Great experience! What I originally ordered was on back order so they reached out with a solution and sent me the updated better new filter for no additional cost. I’m super happy with the gravity filter, it filters way faster than the one from a previous brand, water tastes cleaner, and cost was way lower and is third party tested! It did take a while to get a response about my order but once they reached out, it was quick and prompt and super helpful! Thanks Greenfield!

  29. Robbie (verified owner)

  30. Kayla D. (verified owner)

  31. Gina E. (verified owner)

    Such an upgrade from the berkey filters! Much faster flow and easier to set up. So happy I found this company!

  32. Teesee Logan (verified owner)

    So good! We have a Berkey and were so disappointed to find out the lawsuits about their filters not doing what they claim. I was about to sell mine when a friend told me about your filters and that they fit the Berkey. I ordered right away along with the mineral bag and I will tell you our water tastes 💯% better than it ever did with the other brands filter. I am recommending your company and products to all my friends and family.

  33. Sarah D. (verified owner)

    Best filters to replace my berkey filters with. Excellent customer service too. Thank you!!!

  34. Nena S. (verified owner)

    So far so good about a month in and filling up my travel tank daily. Slower than my B filters but it’s not a problem

  35. Lukas C. (verified owner)

    These ceramic filters are the best we’ve used for filtering our municipal tap water! We will continue to replenish them annually as recommended.

  36. Travis Morton (verified owner)

    Filters faster than original Berkey filter and not having to prime them is great for traveling. The water tastes completely different even before adding the mineral packets. Hands down the best filters we have purchased for our Berkey.

  37. Kristian S. (verified owner)

    Great product! quick delivery! Happy customer!

  38. Katrina (verified owner)

    This filter works perfectly in my Berkey. I love how great the water tastes

  39. Verified Buyer (verified owner)

    Amazon customer service one arrived brokend and they replaced it immediately. Great filters better than berkey!

  40. Verified Buyer (verified owner)

    Was glad to be able to replace my Berkey water filters with Greenfield!

  41. Jessica (verified owner)

    Some of the best customer service I’ve received. I worked with Jordan and replacing one filter because it was broken in an accident.

  42. Susan A. (verified owner)

    the absolute best smoothest water i have ever tasted!

  43. Amber Z. (verified owner)

    No complaints – love these filters!

  44. Verified Buyer (verified owner)

  45. Alyssa (verified owner)

    I always use these filters and can tell when I need new ones because my water starts tasting horrible. I’m pretty sure I poisoned myself a few days before I got the replacements lol

  46. Stephanie H. (verified owner)

    I’m loving these replacement filters, and will be buying additional filters to keep on hand.

  47. Jennifer K. (verified owner)

    Recommending to all my friends for the best filter!

  48. katy (verified owner)

  49. Jahvaughn Lehtonen (verified owner)

  50. Verified Buyer (verified owner)

    We love our new filters! They are quick filtering and we like only needing two filters rather than four.

  51. Wayne McDaniel (verified owner)

    Excellent filters

  52. Colton (verified owner)

    We got the aquametix filters. Honestly love them. I noticed such a difference in the taste of our water. It made our water “tasteless” if that makes any sense! Our tap water tasted a bit metallicy, but with these filters it changes the taste greatly, like eliminating any taste. We got the mineral bag too, so we are atleast getting our minerals even when filtering out the bad property’s from the tap. There is no priming but you do have to fill the berkey twice and discard the water (“as a pre -priming” what the instructions said). That took forever, but now it’s so fast at filtering water into the basin. Will definitely be buying these filters again- we also live in the city!

  53. Amanda M. (verified owner)

    Love the filters! And appreciate the customer support that helped me decide which filters would be best for our needs.

  54. Bobbie (verified owner)

    Absolutely love these filters. Switched from berkey filters to these over a year ago and never looking back!

  55. Kelly (verified owner)

  56. Kayla L. (verified owner)

  57. Macy (verified owner)

    We are loving our filters! I can definitely taste the difference in our water and it feels so good knowing my water is being filtered so well! I love the lab results and transparency that Greenfield provides for how well their filters filter things that do not belong in water. I also LOVE the mineral bag option!

  58. Melissa (verified owner)

    Cerametix are great filters. Water tastes fresh/has no distinguishable taste, if that makes sense. First few fillings filtered slowly overnight, but after a week it was filtering a bit faster.

  59. Deon V. (verified owner)

  60. Anonymous (verified owner)

    Amazing customer service and product. Will be ordering in the future.

  61. Jacob Ross (verified owner)

    Filter was sold out twice when trying to order. But am happy with the filter I ended up receiving

  62. Shelley (verified owner)

    Very easy to install. Water tastes great!

  63. Robert K. (verified owner)

    Great products! And awesome customer service.

  64. daniel rainwater (verified owner)

  65. Erica R. (verified owner)

    I purchased the Cerametix with the mineral bag. Wow, what a huge difference in taste for my gravity feed water!! I actually enjoy drinking water now. I was using filters from Radiant Life, but they are nothing compared to these! I highly recommend these products!

  66. Theresa Ferguson (verified owner)

    Happy with purchase !

  67. Bonnie (verified owner)

    I’m so very pleased with the ceramic filter and minerals bag. It was so much easier to set up than the other brand I was using (no priming!), and it tastes dramatically better too. I can finally drink plain water again.

Only logged in customers who have purchased this product may leave a review.