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 1" to 5"
Medium size 6" to 8"
Large size 9" to 12"
Extra Large 13" and up. ($20 oversize shipping applied)