UNS · Stone
Ancient Stone
Iwagumi keepers who like the Manten look and want a slightly darker, more angular stone.
4 models
UNS · Stone
UNS Dark Blue Slate Stone
Flat blue-charcoal slate that turns much darker once wet. It stacks cleanly into caves and ledges and makes a stable base under driftwood.
Updated
Best for
Stacked cave and ledge builds, and as a stable, hidden base for wood layouts.
What stands out
- 5, 10, 20 and 30 lb lots
- Blue-charcoal with random striations
- Flat profile for stacking and caves
- Easy to split into smaller pieces for moss stones
Models and specs
| Model | Weight |
|---|---|
| 5 lbMJ112905 | 2.3 kg |
| 10 lbMJ112910 | 4.5 kg |
| 20 lbMJ112920 | 9.1 kg |
| 30 lbMJ112930 | 13.6 kg |
- Brand
- UNS
- Effect on water
- Inert
- Colour
- Blue-charcoal, darkens 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 Dark Blue Slate Stone, drawn from its specs.
Does Dark Blue Slate Stone affect water chemistry?
Inert.
How do I prepare Dark Blue Slate Stone before use?
Rinse and scrub well before use
Who is the UNS Dark Blue Slate Stone best for?
Stacked cave and ledge builds, and as a stable, hidden base for wood layouts.
What are the alternatives to the UNS Dark Blue Slate Stone?
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.