Best in 7 days
Pay in installments of $6.96 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jun 28 - Jul 3
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Seachem Onyx Sand Freshwater Substrate - 15lbOnyx Sand is a porous clay gravel for the natural planted aquarium. Being carbonate rich, Onyx Sand provides an advantage to any plants able to utilize bicarbonates. Onyx Sand is most effective when used alone as an integral substrate bed, but it may be mixed with other gravels. Gravel modifiers such as laterite are not necessary. Onyx Sand is not chemically coated or treated and will not alter the pH of the water. Although pre washed, it may be
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
Discover Niche Categories That Outsell
Top-Converting Item to Boost Your Average Order
Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.4 ★★★★★
Based on 393 reviews
Sort
Product Reviews
★★★★★ 5
Great filter!!
Great filter, easy to install.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2025
★★★★★ 5
Price
Very nice active coal
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 6, 2025
★★★★★ 2
Weird Smell
Good for but the carbon has a weird smell. I have a sensitive nose and I'm not a fan. Going to replace with a regular filter without the activated carbon.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 1, 2025
★★★★★ 5
Good quality
Fits perfectly
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 5, 2026
★★★★★ 5
Perfect fit for boyh filters
Watched a youtube video, easy changed both filters in 10 minutes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 18, 2026
