Clear, Fresh Water Your Fish Will Love
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Easy filtration for happy tanks.
These Honeycomb Activated Carbon Filter Blocks help keep your aquarium water fresh and clean. Their smart honeycomb design traps impurities and odors so your fish can enjoy a calm, clear home. Just place them in your fish tank filter system, and let the carbon do the work.
Great for any aquarium setup.
✔ Improves clarity fast
✔ Helps remove unwanted smells
✔ Simple to install and replace
Rinse before use. Replace when clogged. Sizes: Small 10×10×5 cm and Large 10×10×10 cm.
We are proud to offer duty-free, reliable, tracked shipping— delivered to your door in over 200 countries worldwide!
Below you can check our average shipping times:
Domestic USA Shipping: 2-9 business days
US & Canada: 7-18 days
Europe: 7-18 days
Europe Plus*: 8-30 days
Australia, New Zealand: 7-18 days
Hong Kong, Singapore: 7-18 days
Rest of the world: 8-30 days
*does not include processing times up to 2 business days or longer in peak periods
Primarily we ship out from fulfillment centers in the United States, Eastern Asia and Western Europe. If the item you've purchased is out of inventory in your nearest location, we'll send it directly from our production lines at the same delivery times as stated in our shipping section.
Do these carbon blocks fit most aquarium filters?
Yes, they work with many fish tank filter systems. Just align the block with the water flow during setup.
Gives your fish a fresh and inviting space.
Supports a stable and comfortable home for aquatic life.
Encourages smooth and even water filtration.
Keeps your tank smelling clean and pleasant.
Drop them in your aquarium filter and let them work.
Simple, effective filtration for fish keepers of all levels
| Features | MK Aquarium | Knock-Offs |
|---|---|---|
| Carbon filtration material | ||
| Honeycomb structure | ||
| Multiple size options | ||
| Includes biochemical cotton | ||
| Easy setup | ||
| Improves clarity | ||
| Odor reduction | ||
| Works with many filters | ||
| Good for aquariums and fish tanks |
You can choose Small at 10×10×5 cm or Large at 10×10×10 cm.
Yes, some sets include biochemical cotton in different lengths depending on the size and quantity.
Yes, they work well in new tanks and established aquariums alike.
Yes, they are made from carbon and designed for aquarium use.
Place them in your filter system and match the block with the water flow.
No, just rinse before use. Replace when clogged.
Yes, they help improve clarity by removing impurities.
They are not reusable and should be replaced when full or clogged.
They help keep water clear and do not add any color.
