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Manten rock (Ancient stone)

Price range: $13.00 through $230.00
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Manten rock, Ancient stone
for Aquascaping and decorating aquariums
Premium dark grey layered aquascaping stone ideal for Iwagumi and nature-style aquarium layouts, providing a bold, natural mountain look with minimal impact on water parameters

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Description

Price per kg: $13
Please visit our shop to select individual rocks.

Product Name:
Ancient Manten Rock

Aquascape Material Detail:
Natural weathered aquascaping stone formed from ancient sediment layers

Japanese name:
万天石 (Manten-seki)

Chinese name:
万天石

Type: (Rock / Wood / Gravel / Sand)
Rock

Color tone: (Dark grey / Brown / Reddish / Mixed / etc.)
Dark grey to charcoal with light mineral veins

Texture: (Smooth / Sharp / Layered / Porous / Rough)
Layered, rough surface with natural crevices

Density: Dense (Density rating: 4.5 / 5)

Weight guide: (Light / Medium / Heavy for its size)
Heavy for its size

Water parameter effect:
• pH influence: Minimal
• Hardness (GH/KH) impact: Slight

Shrimp safe: Yes
Fish safe: Yes

Pre-treatment needed: (Rinse / Soak / Boil wood / None)
Rinse

Best used for:
Nature style / Iwagumi / Hardscape base / Shrimp tank

Suitable tank size: (Nano / Medium / Large tanks)
Medium / Large tanks

Stacking stability: Moderate

Long description:
Ancient Manten Rock is a premium aquascaping stone highly sought after for nature aquarium layouts, especially Iwagumi and natural style aquascapes. Its dark grey to charcoal coloration with subtle mineral veins creates strong visual contrast against green aquatic plants, making it ideal for creating dramatic mountain-like hardscape compositions. The layered texture and weathered surface add depth, realism, and scale to aquariums, closely mimicking natural landscapes found in river valleys and rocky terrains. Due to its high density and solid structure, this aquascape rock provides excellent stability for building terraces, cliffs, and structured hardscape foundations in planted tanks. It has minimal impact on pH and only a slight influence on water hardness, making it safe for most freshwater fish and shrimp when properly rinsed before use. Ancient Manten Rock is a top choice among aquascapers looking for a bold, natural, and professional hardscape material that enhances plant growth visuals and overall aquascape depth.

Other notes: Does not release tannins

Aquascaping style compatibility: Example: Excellent for Iwagumi, nature style, and mountain-inspired aquascape layouts

Aquascaping difficulty: Intermediate

Edge type: Natural sharp

Preparation time: Ready to use after rinsing

Aquascaping with Ancient Manten Rock in Singapore

Manten rock is a layered, weathered stone with deep crevices and pale mineral veining that catches light beautifully in a planted layout. Its rough, fissured surface gives moss, Bucephalandra and crypts plenty of anchor points, while the dark charcoal tone provides strong contrast against bright stems. Because it is sold per kilogram, we encourage you to visit and hand-pick pieces so faces, angles and grain work together for your specific tank.

Being dense and heavy for its size, plan your hardscape mass against your cabinet and floor loading, which matters in HDB and condo settings where a larger scape adds up fast. We recommend rinsing each piece well before placement. Manten generally has limited effect on water hardness compared with calcareous stones, but always test your parameters after setting up and during the first weeks.

Explore more options in our rock and stone range. For composition ideas see our iwagumi rock placement walkthrough and our guide to aquascaping with driftwood and stone.

Specifications

Aquarium rock sizes

10-15cm, 15-20cm, 20-30cm, 30-50cm, 5-10cm, Mixed (10kg), Mixed (20kg)

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