WIO Boulder – Solar Eclipse

WIO Solar Eclipse Boulder Stone Kit brings a unique dimension to aquascaping — these specially cut boulders feature a flat base that allows them to be placed directly on the aquarium floor, creating the stunning illusion of a submerged boulder with only its rounded top breaking the surface. The result is an instantly convincing riverscape or shallow biotope, more natural and immersive than conventional hardscape placement.

Solar Eclipse Boulders are warm and luminous, with soft shades of yellow, orange, sandstone, and pale pink that glow under aquarium lighting. The flat-cut face reveals delicate layered striations in cream and rose tones, while the natural exterior surface retains all the rugged character of a river-worn boulder. This interplay of polished interior and natural exterior gives each piece a geological depth that reads beautifully both dry and submerged.

Position the main boulder slightly off-center on the tank floor and allow substrate to lap naturally around its base; the flat bottom eliminates rocking and keeps the piece stable without adhesive. Pair with warm sands and fine gravels to complete the shallow riverbed illusion. Solar Eclipse complements its dark counterpart, the Lunar Eclipse Boulder, for a striking light-and-dark composition.

Key Points

• Flat-cut base allows placement directly on aquarium floor — creates a convincing submerged boulder effect
• Ideal for shallow river biotopes, streamscapes, and minimalist Iwagumi layouts
• Warm yellow, orange, sandstone, and pale pink tones with layered interior striations
• Natural exterior surface contrasts beautifully with the smooth cut face
• Pairs with Lunar Eclipse Boulder for dramatic light-and-dark compositions

Characteristics

• Type: Sedimentary stone (flat-cut boulder)
• Color: Warm yellow, orange, sandstone, and pale pink tones
• Texture: Natural rugged exterior with smooth flat-cut base revealing layered striations
• Stone size: Typically 10 to 30 cm
• Water Hardness: May raise pH and hardness slightly; regular water changes maintain stability

Availability at Cuboid Nature Aquarium

• Bulk Pack — 4.5 kg (10 lb):Hand-selected by Cuboid from our bulk inventory; individual pieces approximately 3 to 10 inches, chosen for quality and character
• Box — 10 kg (22 lb):WIO’s curated size mix, hand-selected assortment of stones
• In-Store:Visit us in Pipersville, PA to hand-pick individual stones by the pound — choose exactly the pieces and sizes you want for your layout

Usage

• Suitable for both aquatic and terrarium environments
• Place flat base directly on aquarium floor or substrate for a natural submerged boulder effect
• Rinse rocks and stones with water before use; use a brush to clean before introducing to the aquarium
• The flat base provides stability — no need for additional cushioning or adhesive for most placements
• Position stones a few centimeters/inches away from aquarium glass walls to facilitate maintenance
• Control any alterations in pH and kH by regular water changes with osmotic or soft water, or by using a water softener if necessary
• Safe for fish, shrimps, and other aquatic animals

Available from Cuboid Nature Aquarium — Authorized Retailer for WIO.