UNS · Stone
Ancient Stone
Iwagumi keepers who like the Manten look and want a slightly darker, more angular stone.
4 models
UNS · Stone
UNS Cloud Stone
A soft grey and brown stone with white flecks and a weathered, eroded surface. It reads as mountains and cliffs without the heavy contrast of darker rock, so it suits scapes where the plants should do the talking.
Updated
Best for
Iwagumi and mountain-style layouts in 60 cm tanks and up, where you want enough stone for a full main-stone arrangement in one order.
Worth knowing
Only sold in a 30 lb lot, which is a lot of rock for a nano tank.
What stands out
- Sold as a single 30 lb (about 13.6 kg) box of mixed sizes
- Muted grey-brown colour with random white markings
- Craggy, eroded texture that stacks into peaks
- Works well with carpets, grasses and sandy paths
Specs
| Model | Weight |
|---|---|
| 30 lb boxUNSH2526-30 | 13.6 kg |
- Brand
- UNS
- Effect on water
- Not stated by the seller; do a vinegar fizz test and check KH/GH before use
- Colour
- Soft grey and brown with white markings
- Texture
- Rough, weathered and eroded
- Prep
- Rinse and scrub well; the seller advises against boiling
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 Cloud Stone, drawn from its specs.
Does Cloud Stone affect water chemistry?
Not stated by the seller; do a vinegar fizz test and check KH/GH before use.
How do I prepare Cloud Stone before use?
Rinse and scrub well; the seller advises against boiling
Who is the UNS Cloud Stone best for?
Iwagumi and mountain-style layouts in 60 cm tanks and up, where you want enough stone for a full main-stone arrangement in one order.
Is there anything to watch out for with the UNS Cloud Stone?
Only sold in a 30 lb lot, which is a lot of rock for a nano tank.
What are the alternatives to the UNS Cloud 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.