Two POSTreat Fluoride Reduction Filter packages on a white background

Three gold-colored packaging bags with 'POSTreat' branding on a light gray background

POSTreat FluoRid Media Refill

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 Smart Carbon Cartridges, it’s not a stand-alone.*

Looking for the complete Phoenix Gravity System? Find it here.

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Pack of 1 lasts up to 4 months
Pack of 2 lasts up to 8 months
Pack of 3 lasts up to 12 months

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£75.00

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What’s in the box?

• 4 x Replacement media for POSTreat Fluoride Removal Cartridges.

• Removes >95% of fluoride from your water.

• Lasts up to 8 months.

Key Features

Shipping and Returns

You may be looking for:

100 day money-back guarantee when purchased with the complete Phoenix Gravity system

Removes more than
95% of fluoride

Housed in highest-grade stainless steel

Perfectly compatible with Phoenix Gravity Filter System

Less waste, fewer
refills, lower cost

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

Shop now

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Filtration At Its Finest

Removes more than 95%
of fluoride

Compatible with Phoenix
Gravity Filter System

Highest-grade
stainless steel

Planet-friendly
purification

Fresh taste you
can trust

Less waste, fewer
refills, lower cost

Why fluoride-free water?

From skeletal fluorosis, a condition that weakens bones, to potential impacts on the thyroid and nervous system, the risks associated with fluoride ingestion are growing. Children are particularly vulnerable to fluoride's effects, with studies linking it to lower IQ and impaired cognitive development.

It's crucial to be informed about the fluoride levels in your water supply. Phoenix Gravity POSTreat fluoride removal cartridges are designed to remove up to 95% of the fluoride in your water. Because we care about your health and the well-being of your family.

Ready To Experience Water, As It Should Be?

Complete Purchase

FAQs

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).

77%

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16%

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The Phoenix Gravity Water Filter is an
Excellent water filter, well made and stylish, easy to assemble and to get started filtering water. The water tastes better, we have in the past used filter jugs as the water in Northampton lately has tasted OK but of late has had a slight yellow tinge, not very appealing and very unusual as the mains water has normally been of good quality and appearance.

refill post treatment fluorid arrived swiftly and safely. loving our Phoenix water filter!

Great water filter, I know now that I am drinking the cleanest water. Goodness knows what chemicals goes into our tap water.💧My tea tastes better🫖☕️

Dear Melanie,

Thank you very much for your 5-star review. We’re delighted to hear that you’re enjoying clean, great-tasting water and that it has made a noticeable difference to your tea as well. Providing confidence in water quality is exactly what we aim for.

We truly appreciate your support and thank you for choosing Phoenix Gravity Water Filters.

Warm regards,
Phoenix Gravity Water Filters Team

It’s is an excellent product, water is amazing clear and nice to drink, things to consider.
- preparing and setting everything up took a lot longer than expected and the guidance wasn’t very clear in pictures or videos.
- the additional fluoride filter takes up space in the lower chamber and I would have got the next size up if I realised.
-the tap position means it doesn’t drain all the water. I have to tip the unit slightly at an angle.

Hi there,

Thank you very much for sharing your detailed feedback. We’re pleased to hear that you’re enjoying the excellent water quality and clarity—providing clean, great-tasting water is exactly what we aim to deliver.

With regard to the setup instructions, we would like to clarify that detailed guidance for installation and priming is available on our website through step-by-step videos. That said, we truly appreciate your feedback and will take it seriously as part of our ongoing efforts to enhance clarity and ease of use.

Concerning the POSTreat Fluoride Removal Filter Cartridge, while it does occupy space in the lower chamber, it does not impact filtration performance. All water poured into the upper chamber is filtered as intended. Should you wish to upgrade to a larger system for added capacity, please contact us via email and we will be happy to assist.

Regarding the stainless steel tap, it is designed to drain most of the water efficiently. In some cases, a small amount of residual water may remain depending on placement and surface level.

Feedback like yours is invaluable and helps us continuously improve our instructions, product design, and overall customer experience.

Warm Regards
Phoenix Gravity Water Filters Team

I received the Phonix water filter and was very excited to try it. However, from the beginning, the water had a slimy and bitter taste. I emailed customer service three times (5 months ago) but have not received a response yet. I also tried to call them, but I couldn’t find a number, and the one I managed to locate went unanswered. I would say their customer service has been terrible with no replies at all.

I continued to use the filter, hoping that the taste would improve because it was new. While the taste did get somewhat better, I’m still unsure if it worked as advertised. Ultimately, the taste remains similar to tap water, so it’s not a good experience for us.

The Teak Wood Stand is an added bonus to the water filter. It elevates it both practically and aesthetically,

Dear Sandra,

Thank you for the fantastic 5-star review.

We’re so pleased to hear that you’re enjoying the Teak Wood Stand and that it adds both practical value and aesthetic appeal to your Phoenix Gravity Water Filter. It’s great to know it has enhanced your overall experience.

Thank you for choosing Phoenix Gravity. Your satisfaction truly means a lot to us, and we’re always here if you need any assistance.

Kind Regards
Phoenix Gravity Water Filters Team

I have had filter jugs for some years but the Phoenix Gravity Water Filter is ideal for my requirements and easy to assemble. The resulting water is SILKY to drink. I am so pleased with my purchase.

Thank you so much for your wonderful 5-star review.

We’re delighted to hear that the Phoenix Gravity Water Filter is ideal for your needs and that you found it easy to assemble. Describing the water as “silky” truly makes our day, this is exactly the experience we aim to deliver.

We sincerely appreciate your support. You are a valued customer, and your satisfaction means a great deal to us.

Very happy with it all. Some problems with the delivery but great customer care from Phoenix. Water tastes clean and clear; the urn is rather handsome. Should have done it years ago.

Dear Andrew,

Thank you so much for your fantastic 5-star review.

We’re truly happy to hear that you’re very satisfied with your Phoenix Gravity Water Filter. While we apologize for the initial delivery issues, we’re glad our customer care team was able to support you effectively. You are a valued customer, and your satisfaction means everything to us.

At last someone cares about our polluted water and doing something about it. It's a beautiful substantial well made water filter which is easy to put together when instructions are followed. Would highly recommend this product. Thank you

We truly appreciate your kind words and your support. It means a great deal to us to know that you value our efforts in addressing water quality concerns. We’re delighted to hear that you find the Phoenix Gravity Water Filter well made, easy to assemble, and effective.

Your recommendation is incredibly important to us.

Deliciously fresh water, couldn't be happier!

Dear Sasha,

Thank you so much for your wonderful 5-star review.We’re delighted to hear that you’re enjoying deliciously fresh water and that you couldn’t be happier with your Phoenix Gravity Water Filter. Your satisfaction truly means a lot to us.

POSTreat FluoRid Media Refill

What’s in the box?

Key Features

Shipping and Returns

You may be looking for:

Removes more than
95% of fluoride

Housed in highest-grade stainless steel

Perfectly compatible with Phoenix Gravity Filter System

Less waste, fewer
refills, lower cost