Marineland Black Diamond Activated Carbon (22 oz)
$11.46
Classic bulk activated carbon for removing tint, odour and leftover medications. A jug this size refills a hang-on-back for a fraction of the cost of branded carbon cartridges.
Pros
- Premium activated carbon that pulls out discolouration, odours and medications for fine polishing
- Bulk bag — a 22 oz jug refills cut-to-fit media chambers many times over
- Far cheaper per refill than buying a branded carbon cartridge each month
- Universal loose carbon — scoop it into any media bag to fit most filters
Cons
- Carbon is single use — it saturates and must be swapped every few weeks, not rinsed and reused
- Not a biological medium; it does little once exhausted
Score breakdown
Specifications
| Media Type | Chemical (activated carbon) |
|---|---|
| Surface Area | High (activated) |
| Volume | 22 oz bulk |
| Replacement Interval | Every ~3-4 weeks (single use) |
| Reusable | No - replace when spent |
| Lifespan | Weeks per charge |
| Compatible With | Any filter (loose) |
| Format | Loose granules |
| Dimensions | Granular |
Alternatives
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The buy-it-once biological media: a porous ceramic with enormous high surface area for bacterial colonisation, inside and out. Rinse and reuse for years — it never needs replacing.
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A rechargeable synthetic resin that polishes water to a sparkle and pulls out organic waste before it becomes nitrate. Bleach-regenerate it and reuse — not a single-use carbon.
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