UNS · Stone
Ancient Stone
Iwagumi keepers who like the Manten look and want a slightly darker, more angular stone.
4 models
UNS · Stone
UNS Icelandic Lava Stone
A lava rock with more character and texture than standard black lava, and slightly denser. It keeps the porous surface that epiphytes love while giving you craggier, more mountain-like shapes.
Updated
Best for
Mountain-style scapes where you want the plant-friendliness of lava with more realistic rock shapes.
Worth knowing
Rough surface; keep long-finned fish in mind.
What stands out
- 4, 7, 13 and 21 lb lots
- Grey-brown porous lava
- Rough texture that stacks with good grip
- Suits Iwagumi and mountain-style scapes
Models and specs
| Model | Weight |
|---|---|
| 4 lbILS0004 | 1.8 kg |
| 7 lbILS0007 | 3.2 kg |
| 13 lbILS0013 | 5.9 kg |
| 21 lbILS0021 | 9.5 kg |
- Brand
- UNS
- Effect on water
- Inert
- Colour
- Grey-brown
- Texture
- Porous, craggy
- 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.
What lava rock does to your water
Inert, no effect on pH or hardness. As a bonus, the huge internal surface area hosts beneficial bacteria, so it doubles as biological media.
Full Lava Rock guideCompare 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 Icelandic Lava Stone, drawn from its specs.
Does Icelandic Lava Stone affect water chemistry?
Inert.
How do I prepare Icelandic Lava Stone before use?
Rinse and scrub well before use
Who is the UNS Icelandic Lava Stone best for?
Mountain-style scapes where you want the plant-friendliness of lava with more realistic rock shapes.
Is there anything to watch out for with the UNS Icelandic Lava Stone?
Rough surface; keep long-finned fish in mind.
What are the alternatives to the UNS Icelandic Lava 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.