Black Mountain Seiryu is the darker cousin of the well known Seiryu stone. We personally like the darker grey, almost blueish tone that it has compared to regular light grey Seiryu. The craggy texture and endless details in these stones allow you to easily create a natural-looking aquascape.
Seiryu may slightly raise pH and water hardness. Aqua Soil can help balance that out.
If you are looking for larger stones, a minimum weight may be required. Larger stones = higher weight. Email our team if you need assistance.
Stones require rinsing prior to use.
These stones are dense and generally larger, ranging from 5-16". The larger pieces have more weathering and texture.
Stone coloration darkens when wet.
Some stones may alter water chemistry. Please do thorough research to ensure this stone is suitable for your setup.
Small size 2" to 5"
Medium size 5" to 8"
Large size 8" to 12"
Extra Large 13" and up.
You may return most new, unopened items within 14 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.
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.