The fluoride specialist of our Big Blue range: natural bone char media that helps reduce fluoride along with heavy metals, chlorine, taste, and odor — in one whole-house cartridge.
Stage
Specialty stage · after sediment
Fits
Standard Big Blue housings
What it does
Bone char is the classic natural media for fluoride. Made by carbonizing animal bone, it’s rich in a calcium-phosphate mineral (hydroxyapatite) with a genuine affinity for fluoride ions — something standard activated carbon simply doesn’t have. Under suitable conditions, it helps reduce fluoride at low-to-moderate levels, and the same mineral structure helps reduce heavy metals such as lead, cadmium, zinc, and copper, and can help reduce arsenic.
Because bone char is also a form of activated carbon, it pulls double duty: it reduces chlorine, taste, and odor as it works, so it can stand in as a carbon stage while it targets fluoride.
The 10″ × 4.5″ Big Blue format carries enough media mass to serve a whole-house line. Run it after a sediment stage; on chloraminated water or where maximum taste polishing matters, follow it with a catalytic or carbon block stage.
Key benefits
- ✓ Helps reduce fluoride — bone char’s specialty
- ✓ Helps reduce heavy metals: lead, cadmium, zinc & copper
- ✓ Helps reduce arsenic under suitable conditions
- ✓ Reduces chlorine, taste & odor as it works
- ✓ Natural, time-proven filtration media
- ✓ Whole-house Big Blue capacity with low pressure drop
Specifications
| Cartridge type |
Bone char specialty media (Big Blue) |
| Nominal size |
10″ × 4.5″ |
| Micron rating (nominal) |
25 micron |
| Media |
Natural bone char; polypropylene core & outer shell |
| Recommended position |
Specialty stage — after sediment (typically Stage 2) |
| Operating temperature |
40 °F – 100 °F (cold water use) |
| Max pressure |
90 PSI |
| Typical life |
3–12 months (varies with water quality & usage) |
| Brand |
MyWaterClub (made for MyWaterClub) |
| SKU |
BC-10BB |
Helps reduce
What this cartridge targets — and what it isn’t built for.
Fluoride
Lead · cadmium · zinc · copper
Arsenic
Chlorine
Taste & odor
Fine sediment
Chloramine
Scale / hardness
Dissolved solids (TDS)
Which 10″×4.5″ cartridge do I need?
The MyWaterClub Big Blue 10″×4.5″ range by stage. Your current filter is highlighted.
| Cartridge |
Type |
Best for |
| Stage 1 — Sediment |
| SED5-10BB |
Melt-blown sediment 5 µm · disposable |
Municipal or moderate sediment — best value |
| SED5-PLT-10BB |
Pleated sediment 5 µm · washable |
Heavy sediment & well water — rinse & reuse |
| Carbon stages — high flow (granular) |
| GAC-10BB |
Granular activated carbon · 25 µm |
High-flow chlorine, taste & VOC reduction — best value |
| CGAC-10BB |
Coconut shell GAC · 25 µm |
Premium taste & VOC reduction at full GAC flow |
| CAT-10BB |
Centaur® catalytic carbon · 25 µm |
Chloraminated city water · chloramine, chlorine & H₂S odor |
| CATKDF85-10BB |
Catalytic carbon + KDF-85 · 25 µm |
Flagship: chloramine, H₂S & heavy metals · longest service life |
| Carbon stages — fine polishing (block) |
| CTO-10BB |
Carbon block (CTO) · 10 µm |
Everyday chlorine, taste & odor polishing — best value |
| CACB-10BB |
Premium coconut carbon block · 10 µm |
Best taste & odor polishing · longest carbon life (6–12 mo) |
| Specialty media |
| BC-10BB (this filter) |
Bone char · 25 µm |
Helps reduce fluoride, heavy metals & arsenic (plus taste & odor) |
| IRON-10BB |
Iron-removal + softening resin |
Clear-water (dissolved) iron · light softening |
| SCALE-10BB |
Scale-inhibitor media |
Scale protection for heaters & appliances (does not remove hardness) |
Good to know before you buy
Fluoride reduction depends on contact time. At full whole-house flow, water moves through the media quickly, so expect meaningful help at low-to-moderate fluoride levels rather than complete removal. For drinking-water-critical fluoride reduction, pair this whole-house stage with point-of-use filtration (bone char or RO) at the tap — that combination is the strongest setup we sell.
It’s a natural, animal-derived media. Bone char is made from carbonized cattle bone — time-proven and highly effective, but not suitable for households that prefer vegan products. That’s the honest trade-off of the best natural fluoride media.
Flush thoroughly on install. Bone char sheds harmless dark fines at first — run water to drain until it’s fully clear before use, a few minutes longer than a standard carbon cartridge.
Sediment first. Keep a sediment cartridge ahead of it so the specialty media spends its capacity on fluoride and metals, not dirt.
Building a full stack?
Fluoride-focused whole house
SED5-10BB (Stage 1) + BC-10BB bone char
3-stage with taste polishing
SED5-10BB → BC-10BB → CTO-10BB or CACB-10BB block
Strongest fluoride setup
This whole-house stage + point-of-use bone char or RO at the tap
Chloraminated city water
Swap or add CAT-10BB catalytic carbon — bone char doesn’t target chloramine
Please note: Filter life and reduction performance depend on your water chemistry, pressure, and usage, so results vary from home to home. This product is not certified to treat water of unknown quality and is not a substitute for testing your water. Descriptions use general, qualified language and are not health claims. When in doubt, test your water or ask us and we’ll help you build the right stack.
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