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POSTreat Fluoride Removal Filter Cartridge

POSTreat Fluoride Removal Filter Cartridge

Our first-of-its-kind specialized fluoride filtration uses our proprietary FluoRid media to remove more than 95% of fluoride from your water, while retaining the nutrients your body needs.

*Fluoride removal cartridge for drinking water, compatible with all Gravity Systems. Must be used in conjunction with a primary Phoenix Gravity KokoCarb Cartridges, it’s not a stand-alone.*

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Choose Your Cartridges POSTreat Fluoride Removal
Regular price £69.00
Regular price Sale price £69.00
Sale Sold out
In Stock
Taxes included. Shipping calculated at checkout.

What’s in the box?

  • 2 x POSTtreat Fluoride Filters containing proprietary FluoRid media

Key Features

  • Engineered to remove over 95% of fluoride and arsenic from your drinking water.
  • Durable  304 stainless steel casing which is rust‑resistant and free from plastic leaching.
  • Designed to work in tandem with the Phoenix Gravity Smart Carbon Cartridges.
  • Reusable/refillable cartridge design helps reduce waste and long‑term cost.

Shipping and Returns

  • Refunds are processed within 2 business days upon receiving and inspecting the returned product, and the amount will be credited to your original payment method within 7 business days.
  • A full refund is issued only if the complete product is returned; partial returns receive partial refunds.
  • Exchanges are available only for items with manufacturing defects or faults.
  • Return shipping is the customer’s responsibility and is non-refundable. For items over £99, we recommend using a trackable shipping service.
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10-year warranty
10-Year Warranty on POSTreat Housing. Buy Once, Use for Years.
  • fluoride

    Removes more than95% of fluoride

  • Housed in highest-grade stainless steel

    Housed in highest-grade stainless steel

  • Perfectly compatible with Phoenix Gravity Filter System

  • Filtered water lifestyle image

    Less waste, fewer refills, lower cost

  • Phoenix water filter usage image

    Better taste you can trust for 40+ years

Product Description

  • World’s first refillable fluoride removal cartridge uses advanced technology to remove more than 95% of fluoride, without using reverse osmosis.
  • Fuses natural force of gravity with the highest-grade environmentally-friendly materials for the most effective and sustainable Fluoride removal on the market.
  • Less waste and plastic than other fluoride removal cartridges - no electricity required.
  • Housed in 304 stainless steel, the most chemically-neutral and safe material for domestic water filtration, perfectly compatible with all Gravity Systems and easy to set up.
  • The POSTreat is designed for maximum re-use, with our replaceable proprietary FluoRid Filtration media- refillable every 4 months.

Designed for durability

  • Like the Phoenix Gravity System, the POSTreat has a stainless steel housing that won't leach polyurethane, microplastics, toxins or harmful chemicals into your water over time.
  • Rust-resistant to withstand the rigours of everyday use for 10+ years.
  • The uniquely replaceable FluoRid Media sachets last for 4 months.
Better quality you can taste, on tap.
Complete Purchase

Go one step further for fluoride removal:

  • Our additional POSTreat filter removes more than 95% of fluoride for highly targeted filtration
  • Works in tandem with Phoenix Gravity Filters made of 304 grade stainless steel
  • Designed for maximum reuse, the first on the market with refillable environmentally-friendly materials

Filtration At Its Finest

Removes more than 95%of fluoride

Compatible with PhoenixGravity Filter System

Highest-gradestainless steel

Planet-friendly purification

Fresh taste you can trust

Less waste, fewerrefills, lower cost

Ready To Experience Water, As It Should Be?
Complete Purchase

FAQs

Collapsible content

Is the POSTtreat compatible with all gravity filters or just the Phoenix Gravity Filter?

The POSTreat is compatible with all gravity filtration systems. Remember, it can’t be used alone - so you must have a gravity filtration system and existing Carbon Cartridge to use it.

Can I set it up myself?

Absolutely. The POSTtreat is designed for easy DIY set-up with your Phoenix Gravity System. You simply attach your POSTtreat cartridges to the exposed thread of the Carbon Cartridges. We’ll send detailed assembly instructions with your POSTreat filter.

Can I clean my POSTtreat Fluoride Filter?

Yes, it’s simple! You can clean the stainless steel casing of the POSTreat filter - without the FluoRid media inside - in your home using tap water and a soft brush or mild abrasive. The FluoRid media itself will need to be replaced every 4 months. We’ll include detailed instructions when we send it to you.

Still have a burning question? See our full FAQs here.

The Phoenix difference, straight from the source(s).

  • 5 stars: 59 (76%)
  • 4 stars: 8 (10%)
  • 3 stars: 7 (9%)
  • 2 stars: 0 (0%)
  • 1 star: 4 (5%)
Some of the reviews shown are from related products the merchant grouped with this one.
D
Donna Jones

So, aside from the health benefits of cleaning the water of impurities and fluoride. The water tastes amazing. One of my neighbours visited and commented that it tasted like water from a stream. It is delicious and I used to think water was boring! Recommended 💯

s
sue martin

Love the filter.It looks fabulous and the watertastes amazing

Dear Sue,

Thank you for your positive feedback!
We're glad to hear that you love our filter and that it has improved the taste of your water.
We appreciate your support and hope you continue to enjoy our product.

Have a great day!

Best Regards,
Rakesh
Customer Service Team | Phoenix Gravity Water Filters
+4420 8058 5660
support@phoenixwaterfilters.co.uk
https://phoenixwaterfilters.co.uk

L
Luke
Great addition

When i first started with Phoenix, I brought the Carbon filter as was desperate to have filtered water. Now Finally i got the Postreat Fluoride removal filter and it’s made the water taste even better and so much fresher. I feel confident knowing i am removing 95% of Fluoride especially having two young children. Also appreciate the thought from the design team who made the unit from stainless steel. Meaning no leeching plastic.

I now have great tasting water and properly safe drinking water.

Dear Luke

Thank you so much for your wonderful review! We’re thrilled to hear that the Postreat Fluoride Removal Filter has made your water taste even better and that you feel confident providing safe drinking water for your family.

Our team takes great care in designing each unit, and we’re glad you appreciate the stainless steel construction for its safety and durability. Your feedback truly motivates us to keep improving and delivering high-quality water solutions.

We’re delighted to have you as part of the Phoenix family, and we look forward to continuing to support you with great-tasting, safe water.

Kind regards,
Phoenix Gravity Water Filters Team

L
Luke
Great addition

When i first started with Phoenix, I brought the Carbon filter as was desperate to have filtered water. Now Finally i got the Postreat Fluoride removal filter and it’s made the water taste even better and so much fresher. I feel confident knowing i am removing 95% of Fluoride especially having two young children. Also appreciate the thought from the design team who made the unit from stainless steel. Meaning no leeching plastic.

I now have great tasting water and properly safe drinking water.

Dear Luke

Thank you so much for your wonderful review! We’re thrilled to hear that the Postreat Fluoride Removal Filter has made your water taste even better and that you feel confident providing safe drinking water for your family.

Our team takes great care in designing each unit, and we’re glad you appreciate the stainless steel construction for its safety and durability. Your feedback truly motivates us to keep improving and delivering high-quality water solutions.

We’re delighted to have you as part of the Phoenix family, and we look forward to continuing to support you with great-tasting, safe water.

Kind regards,
Phoenix Gravity Water Filters Team

J
Jeffrey Shergalis

I ordered the 2 pack that should be good for 8 months. Unfortunately what I received was only a single pack, good for 4 months. I can see how it would be confusing for someone packing the shipment as the order invoice says: 2 Pack - quantity: 1. So packing the box you see "Quantity 1", dump 1 in the box and job done.
So, my review here is only 3 star due to order accuracy. I have contacted the company and am awaiting a response (I just received the order and just reached out to them). If they make it right, I will update my review to 4 star (can't be 5 due to the hassle). If they don't make it right, then I have to lower the review as I would have paid double the price for the item.

Hi Jeffrey!

We truly appreciate your feedback and thank you for bringing this to our attention. We’re sorry to hear about the mix-up with your order and understand how frustrating that can be. We strive for accuracy, and your experience is important to us.

We're glad to hear that you’ve reached out to us, and we’re committed to making this right for you. Please keep an eye out for our response, and we hope to resolve this matter quickly.

Thank you for your patience, and we hope to improve your experience moving forward!

Best regards,
The Phoenix Gravity team

S
Samantha Flaherty

Improved the taste immensely

A
Anonymous

Great service and peace of mind that I'm reducing the fluoride in my water.

V
Vickie Matthews

I think this addition makes the water taste so much better

N
Natasha Crossley

Been waiting for my filter media to turn up for almost a month now. Customer service is slow and very unhelpful in escalating a lost package with the courier and either sending me new filter media or refunding me. After this I’m considering changing to a different company that will be less faff and may actually save me money in the long run.

J
Jennifer Rowland

Love the Media Refill
But your website is hard to navigate to be able to remove myself from annual subsciption for the filters

C
Carrie Holly

we like the system and much prefer the taste of the water. Can't comment on the refill itself particularly, as we have no comparison, but it does ideally need two people to unscrew and screw the cartridges back in once re-charged.

Finding a good use for the spent filtrate particles would be even better!

L
Lynne Saunders

I absolutely love this water filter. We chose to include the fluoride filter and the taste of the water is so much better. I have taste tested the water with friends and everyone has found a considerable difference in the quality of the water. Highly recommend.

N
Neil Edwards

The water tastes alright.

C
Customer 6555356

Great tasting water and reassurance it’s flouride free

J
June

First time of using - not saying everything went 100% and was me being a bit unsure but I know this will be done so much better and quicker next time. Yes product is great

Dear June,

Thank you for your kind words!

We're glad you love the product and look forward to helping you even more smoothly next time.

Thanks for choosing Phoenix Gravity Water Filters UK!

Best Regards,
Phoenix Gravity Customer Support Team

H
Helen Fletcher her

Drinking so much more water now! Tastes great!

Hi Helen Fletcher,
We're thrilled to hear you're enjoying the water and the taste. Thanks for sharing your positive experience! If you have any questions or need any assistance, please don't hesitate to contact us. We are happy to help.
Best Regards,
Customer Service Team | Phoenix Gravity Water Filters
+4420 8058 5660
support@phoenixwaterfilters.co.uk
https://phoenixwaterfilters.co.uk

T
Thierry MIKOLAJCZYK

Pas de problème particulier. La fréquence de renouvellement me paraît un peu rapide 4 mois ?

M
Marcin Hryniewski

Water still taste like tap water
After 2 weeks of using new filter balls it got clogged had to take out and hut it multiply time to get it working again

Dear Marcin,

Thank you for reaching out, we are sorry to hear that you are having trouble with your new filter system.

To help us resolve this quickly, could you please provide a few more details.

We want to make sure you have clean, great-tasting water as soon as possible. 

Best Regards,
Phoenix Gravity Customer Support Team

P
Paul Ostendorf

Package showed up with the pouches broken open again.

Hi there,

Thank you for bringing this to our attention. We're sorry to hear that your POSTreat FluoRid Refill media arrived with broken pouches again.

We appreciate your patience and understanding, and we're committed to providing a better experience. Thank you for being a valued customer, and we apologize for the inconvenience this has caused.

C
Christy Kubat
This is the second time ordering the product and when I received it the bags are split open and

This is the second time ordering the product and when I received it the bags are split open and all in the big bag. It causes a mess. Please either put in a small box to ship so they don’t get crushed and break open or get better individual bags that don’t bust open.

D
Daniel Skuya
We had previously received a shipment of FluoRid refill in April

We had previously received a shipment of FluoRid refill in April. But it was shipped in a flimsy thin cardboard envelope. Both packs were split open and beads had filled the envelope. This company replaced the FluoRid, and it was in a box and arrived in good condition. I'm giving it a 5 star because they were good about repacing it.

Dear Daniel,
Thank you for your 5-star review and for taking the time to share your experience.
We sincerely apologize for the condition in which your original FluoRid refill media order arrived. We understand how frustrating that must have been.
We're pleased that our team was able to promptly replace the damaged product and ensure the replacement arrived safely.
Your feedback is greatly appreciated, as it helps us improve our packaging and shipping processes.
Thank you for your patience, understanding, and for giving us the opportunity to make things right.

Warm Regards,

Phoenix Customer Care
Phoenix Gravity Water Filters UK

+44 20 8058 5660
✉️ support@phoenixwaterfilters.co.uk
https://phoenixwaterfilters.co.uk

L
Lucy Calvert

Great

Dear Lucy,

Thank you for your positive feedback on our POSTreat FluoRid Media Refill!

We are glad to hear that you are satisfied with our product.

If you have any further questions or concerns, please don't hesitate to reach out to us.

Have a great day!

Rakesh
Customer Support Team
FAQ Setup Your Filter Become An Affiliate
+44 20 8058 5660
support@phoenixwaterfilters.co.uk
www.phoenixwaterfilters.co.uk

M
Muriel NOER SULAEMAN

J'ai bien reçu et très rapidement, merci. Cependant, je n'ai plus les moyens (petite retraite) de remplacer ce filtre tous les 4 mois. Je le ferai tous les 6 mois, tant pis.

R
R. Carter

Had the Gravity Filter for a while. Seems to be great. Now I need POSTreat FluoRid Media Refill refills, not so great. What is the point of buying the thing if you can't get the refills for it?

h
hashem parvaneh

very good

Dear Hashem,

Thank you for taking the time to leave a review! We are happy to hear that you are satisfied with our POSTreat Fluoride Removal Filter Cartridge. Your feedback means a lot to us. Have a great day!

If you ever need any further assistance, we’re always here to help.

Warm Regards
Phoenix Gravity Water Filters Team
support@phoenixwaterfilters.co.uk
https://phoenixwaterfilters.co.uk