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5 Best Shell Blocks of 2025

Last Updated - 2025/10/04

1
Best Choice

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

SpiroPure

SpiroPure SP-EP-20 20x2.5 5 Micron NSF Certified Coconut Shell Carbon Block Water Filter Cartridge EP-20 155529 CB-25-2005 (Case of 6)

SpiroPure

CA$200.74

More Details
Main highlights
- QUALITY REPLACEMENT: 20” x 2.5” PAC (Powdered Activated Carbon) water filters, compatible with EP-20 / 155529 CEP-20E / 155788-43 and CB-25-2005
- NSF CERTIFIED: This filter cartridge is tested and certified by NSF International to NSF/ANSI Standard 42 for material requirements only
- 5 MICRON RATING: With a nominal filtration rating of 5 micron, our quality NSF Carbon filter reduces fine sediment particles and chlorine taste & odor from tap water
- 30-DAY GUARANTEE: SpiroPure filters have a 30-day money back guarantee. If you do not like the performance of your filter, you can send it back within 30 days of purchase for a full refund
- 20x2.5 NOMINAL: 20” slim filter made with CTO coconut shell carbon filter media
CA$200.74
2

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

SimPure

SimPure 4.5" x 10" Whole House Water Filter Cartridges 5 Micron Coconut Shell Carbon Block Replacement for Housing and Systems DB10P, DB10C, FC15B, GE GXWH40L, GXWH35F, BB-10B, FXHTC, WGB21B, 3-Pack

SimPure

CA$99.99

More Details
Main highlights
- [Wide Compatibility] Fits most of the big 4.5x10-inch blue filter housings (approx. outer diameter 7″ at the top) and 10-inch whole house water systems including but not limited to: SimPure DB10, DB10P, GE GXWH35F, GXWH40L, HB18B, WGB21B, American Plumber W15-PR, W10-PR, AP801T, AP801B, HF45 series, etc.
- [Universal Replacement Filter Cartridge] The standard size makes our CTO filter an ideal replacement for sediment and carbon cartridges including FC15B, DuPont WFHDC8001, Watts MAXETW-FF975 WCBFF975, ClearChoice 84629, Liquatec CB-450-975-05, CTO2-HD10, Pelican CB-BB-10, WDGD-5005, AP817, PP10BB-CC, 155548-43 EP-BB EPM-BB CBC-BB, etc.
- [Reliable Material] This big carbon filter cartridge is made of premium coconut shell charcoal block, wrapped in a food-grade polypropylene non-woven fabric to achieve fine water filtration while avoiding carbon particles leaking into the water. Tested by an independent third-party to meet NSF 42 Standards for material.
- [Low Pressure-Drop] Compared to the 1-micron filters, the 5-micron pore size helps prevent the cartridge from clogging before its adsorption capability is exhausted, maximizing the utilization of the carbon while maintaining a lower pressure drop.
- [High Capacity, Long Lasting] Our carbon filter can filter up to 15,000 gallons of water depending on usage and local water quality. Suggest replacing it every 3-6 months for the average household for optimal performance.
- [5 Micron Fine Filtration] Optimized to perform as both a sediment and carbon block filter, it filters out contaminants down to 5 microns, removes undesirable colors, bad tastes, the smell, and up to 98% of chlorine from well water and municipal water, significantly improving water quality for the whole house.
CA$99.99
3
Best Value

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

SM SunniMix

1.5mm / 0.05 '' White Shell Block Guitar Inlay Material

SM SunniMix

CA$18.77

More Details
Main highlights
- . Widely used in guitar, Banjo and Mandolin Inlay, furniture making, moszic art and jewelry manufacture.
- . White Mother of Inlay Blank for Guitar Fingerboard Guitar Neck.
- . Material: White Shell
- . High grade shell material.
CA$18.77
4

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Hari

HARI Mineral Block Supplement for Small Birds - Oyster Shells - 40 g - 2 Pack

Hari

CA$6.70

More Details
Main highlights
- Rich source of calcium for strong bones and optimal growth
- Made of completely natural ingredients
- Encourages birds to scrape and chew keeping their beaks trim and healthy
- Clip included to easily secure block to cage bars
- 2 units
CA$6.70
5

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Zoo Med

Zoo Med Dr.Turtle Slow Release Calcium Block Provides Required Calcium - 5 Pack

Zoo Med

CA$19.42

More Details
Main highlights
- Provides Calcium
- Easy To Administer
- Conditions Water
CA$19.42

5 Best Shell Blocks of 2025

SpiroPure SP-EP-20 20x2.5 5 Micron NSF Certified Coconut Shell Carbon Block Water Filter Cartridge EP-20 155529 CB-25-2005 (Case of 6)

SimPure 4.5" x 10" Whole House Water Filter Cartridges 5 Micron Coconut Shell Carbon Block Replacement for Housing and Systems DB10P, DB10C, FC15B, GE GXWH40L, GXWH35F, BB-10B, FXHTC, WGB21B, 3-Pack

1.5mm / 0.05 '' White Shell Block Guitar Inlay Material

HARI Mineral Block Supplement for Small Birds - Oyster Shells - 40 g - 2 Pack

Zoo Med Dr.Turtle Slow Release Calcium Block Provides Required Calcium - 5 Pack

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