UNS · Stone
Ancient Stone
Iwagumi keepers who like the Manten look and want a slightly darker, more angular stone.
4 models
UNS · Stone
UNS Black River Slate
Flat dark grey slate that looks almost black underwater. Good for cave stacks, paths and moss stones, or as a base under intricate wood work.
Updated
Best for
Dark-toned layouts and cave stacks where you want slate that disappears into shadow.
What stands out
- 5, 10, 20 and 30 lb lots
- Dark grey to near black when wet
- Flat pieces for stacking and paths
- Easy to split for moss wrapping
Models and specs
| Model | Weight |
|---|---|
| 5 lbMJRS11885 | 2.3 kg |
| 10 lbMJRS11881 | 4.5 kg |
| 20 lbMJRS11882 | 9.1 kg |
| 30 lbMJRS11883 | 13.6 kg |
- Brand
- UNS
- Effect on water
- Inert
- Colour
- Dark grey, near black when wet
- Texture
- Flat, layered
- Prep
- Rinse and scrub well before use
Figures from Glass Aqua's product listing. Makers revise products, so check the current figures before buying. Photos supplied by the brand or its distributor.
Compare with
Browse all hardscape
UNS · Stone
Ashen Stone
Minimal or river-style scapes that want bright, soft stone against lush green planting.
3 models
UNS · Stone
Black Lava Rock
Budget-friendly builds, nano tanks and moss-covered scapes that need plenty of stone volume.
1 model
UNS · Stone
Black Lava Rock Cave
Shrimp and nano tanks that need hiding spots, or scapers wanting planted pockets at different heights.
4 models
Frequently asked questions
Quick answers about the UNS Black River Slate, drawn from its specs.
Does Black River Slate affect water chemistry?
Inert.
How do I prepare Black River Slate before use?
Rinse and scrub well before use
Who is the UNS Black River Slate best for?
Dark-toned layouts and cave stacks where you want slate that disappears into shadow.
What are the alternatives to the UNS Black River Slate?
Other hardscape worth comparing: UNS Ancient Stone, UNS Ashen Stone, UNS Black Lava Rock. Add any of them to the compare table to see the specs side by side.