UNS · Stone
Ancient Stone
Iwagumi keepers who like the Manten look and want a slightly darker, more angular stone.
4 models
UNS · Stone
UNS Fire Stone
A warm brown stone with a serrated, grippy texture full of crevices. It stacks well and suits caves, canyons and mountain terrain.
Updated
Best for
Cave and canyon builds that need stones which lock together when stacked.
What stands out
- 10 and 20 lb lots
- Warm brown tones
- Serrated texture with lots of grip
- Plenty of crevices for moss and plants
Models and specs
| Model | Weight |
|---|---|
| 10 lbMJFS11591 | 4.5 kg |
| 20 lbMJFS11598 | 9.1 kg |
- Brand
- UNS
- Effect on water
- Not stated by the seller; do a vinegar fizz test and check KH/GH before use
- Colour
- Warm brown
- Texture
- Serrated, creviced
- 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 Fire Stone, drawn from its specs.
Does Fire Stone affect water chemistry?
Not stated by the seller; do a vinegar fizz test and check KH/GH before use.
How do I prepare Fire Stone before use?
Rinse and scrub well before use
Who is the UNS Fire Stone best for?
Cave and canyon builds that need stones which lock together when stacked.
What are the alternatives to the UNS Fire 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.