UNS · Stone
Ancient Stone
Iwagumi keepers who like the Manten look and want a slightly darker, more angular stone.

UNS · Stone
A dark charcoal stone with rounded knobs and pockets, a bit like a denser take on volcanic rock. The gaps and crevices are handy for wedging in Bucephalandra, Anubias and moss.
Updated
Island, cliffside or dark Iwagumi scapes where you want a black-grey rock with lots of texture for epiphytes.
Single 30 lb option only, and one of the pricier stones per kilo in this range.
| Model | Weight |
|---|---|
| 30 lb boxUNSH3325-30 | 13.6 kg |
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.
UNS · Stone
Iwagumi keepers who like the Manten look and want a slightly darker, more angular stone.
UNS · Stone
Minimal or river-style scapes that want bright, soft stone against lush green planting.
UNS · Stone
Budget-friendly builds, nano tanks and moss-covered scapes that need plenty of stone volume.
UNS · Stone
Shrimp and nano tanks that need hiding spots, or scapers wanting planted pockets at different heights.
Quick answers about the UNS Chameleon Stone, drawn from its specs.
Not stated by the seller; do a vinegar fizz test and check KH/GH before use.
Rinse and scrub well; the seller advises against boiling
Island, cliffside or dark Iwagumi scapes where you want a black-grey rock with lots of texture for epiphytes.
Single 30 lb option only, and one of the pricier stones per kilo in this range.
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.