Description
xCrystal Cal Activated Carbon for Aquarium Filtration
In aquariums, clear water supports thriving fish, vibrant colors, and easier maintenance. Kolar Labs Crystal Cal Activated Carbon is designed to help maintain water clarity by adsorbing dissolved compounds that can cloud or tint the water and affect scent. The result can be a more inviting tank that showcases your aquatic life.
Premium filtration you can rely on
This activated carbon is offered in bulk and packaged formats, totaling 10.5 lbs (4.75 kg). It uses laboratory-grade carbon with an optimized pore structure tailored for aquarium use. The materials align with Food Chemicals Codex standards, reflecting a careful quality approach trusted by hobbyists and professionals alike.
- Fast, noticeable results for cloudy water, color changes, and odors
- High-performance carbon with optimized pores for effective adsorption
- Versatile filtration compatibility across reactors, canister, in-tank, and hanging filters
- Large granules that promote good flow and filtration efficiency
How to use with confidence
- Rinse briefly before first use to remove any fine dust and prepare for filtration
- General dosing: 1 cup per 50 gallons, or 1 tablespoon per 3 gallons
- Replace every 2–4 weeks to maintain filtration effectiveness and water quality
Whether you manage a community tank, a planted setup, or a species-specific environment, Crystal Cal can be integrated into your preferred filtration approach. It works across a variety of configurations and filter media bags, so you can maintain your existing setup while enhancing performance. Real-life use often highlights the benefit of a consistent filtration material that can adapt to reactors, canister filters, in-tank filters, and hang-on-back systems.
Possible benefits you may notice
- Clearer water with reduced tint from dissolved organics
- Fresh tank aroma and a more inviting aquatic environment
- Flexible usage across different filtration configurations
- Clear maintenance guidance for predictable upkeep
Note that results vary with tank size, bioload, and filtration configuration. Use the dosing guidance provided and monitor water parameters to determine the best maintenance rhythm for your aquarium.
FAQ
Q: What is the size and weight of Kolar Labs Crystal Cal Activated Carbon?
A: Contains 10.5 lbs (4.75 kg) of activated carbon suitable for bulk aquarium filtration.
Q: How often should I replace or rinse the carbon in my tank?
A: Rinse before first use and replace every 2–4 weeks, depending on tank conditions.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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