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465 matching items · Most used first
Substrates & AquascapingUltum Nature Systems
The Boutique Seiryu Stone is a hand-picked premium natural aquarium hardscape stone, superior in character and coloration to standard Seiryu; grey-blue rock with jagged, craggy, heavily veined texture that deepens in color when wet. Ideal for dramatic mountain-style landscapes or minimalist Iwagumi layouts. 5LB to 30LB packs.
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Substrates & AquascapingUltum Nature Systems
The Burmese Petrified Wood is a natural aquarium hardscape stone formed from the fossilized remains of ancient trees; rich, mineralized grain patterns provide a prehistoric accent to live plants. Incredibly durable and holds its detail indefinitely; perfect where an ancient sunken-timber aesthetic is desired. 10LB to 30LB packs.
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Substrates & AquascapingUltum Nature Systems
The Caledonia Stone is a vibrant natural aquarium hardscape rock with multicolored hues of white, gray, blue, brown, and rust tones that deepen when submerged; smooth texture and layered, intricate patterns make each piece one-of-a-kind. Suitable for terrariums, paludariums, or similar planted enclosures. 10LB to 30LB packs.
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Substrates & AquascapingUltum Nature Systems
The Chameleon Stone is an aquarium hardscape stone named for its dramatic color transformation when submerged; dry it is lighter gray, but underwater it takes on a deep black color for a bold, high-contrast look. Provides a dark backdrop for plants, shrimp, and fish. 30LB pack.
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Substrates & AquascapingUltum Nature Systems
The Cholla Driftwood Tree is a decorative tree-shaped aquarium hardscape made from natural Cholla driftwood, the dried husk of the Cholla cactus; its porous surface provides cozy cover for shrimp and grows biofilm that shrimp and fry graze on. Ideal for attaching mosses, Buce, and Anubias. Leaches tannins that may tint water tea-colored. Small (10-17") and Medium (18-24") sizes.
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Substrates & AquascapingUltum Nature Systems
Cloud Stone is a natural aquarium hardscape with a deep gray appearance when wet, giving aquascapes a darker, more grounded look; it works with lush green plants and other hardscape materials for freshwater aquariums. Use it to build hardscape foundations, create contrast, or add accents; combining different sizes creates depth and a natural arrangement. Each piece is naturally unique; 30LB pack. Rinse before use.
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SupplementationUltum Nature Systems
2.5 lb CO2 cylinder from Ultum Nature Systems, designed for use with the UNS Pro Dual Stage CO2 Regulator for planted aquariums. Features an on/off valve instead of a pin valve. It is sold empty and must be filled before use.
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SupplementationUltum Nature Systems
CO2 paintball cylinder from Ultum Nature Systems, designed for use with the UNS Pro Mini Dual Stage CO2 Regulator for planted aquariums. Features an on/off valve instead of a pin valve. It is sold empty and must be filled before use.
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SupplementationUltum Nature Systems
The CO2 Regulator - Pressure Plate Spare Parts Set is a precision repair kit that restores a CO2 regulator's internal pressure plate to factory specifications; it resolves zero output pressure failures caused by locked, fatigued, or unseated internal pressure mechanisms. Universal dual compatibility across the UNS Mini and UNS Pro Dual Stage Regulators; cost-effective alternative to replacing the regulator body.
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Substrates & AquascapingUltum Nature Systems
Ultum Nature Systems Controsand Bora is a fine, natural white decorative sand substrate for planted aquariums and aquascaping, graded at 0.4–0.9 mm with a light palette inspired by natural white sand banks — ideal for beach-style scapes or as an accent against darker substrates. It is fully inert, so it will not alter pH or water hardness and releases no ammonia, while its fine grains support strong root development and are safe for shrimp and other bottom-dwelling species.
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Substrates & AquascapingUltum Nature Systems
Controsand Kona is a natural sand substrate from Ultum Nature Systems in a dark volcanic black-brown tone for aquascaped tanks. The dark grain enhances fish and plant coloration and suits a dramatic, natural riverbed look.
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Substrates & AquascapingUltum Nature Systems
Controsand Mojave is a natural sand substrate from Ultum Nature Systems in a warm desert tone for planted and aquascaped tanks. The fine grain suits bottom-dwelling fish and shrimp while giving a bright, natural riverbed aesthetic.
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Substrates & AquascapingUltum Nature Systems
A natural freshwater aquarium substrate from Ultum Nature Systems (UNS Controsand) in the Santa Fe variety, a rounded pebble gravel in a mix of cool grey and earthy hues inspired by natural riverbeds. With 3 to 5mm grains, it is safe for fish, invertebrates, and reptiles, and works as a foreground accent or standalone substrate that can be paired with UNS Controsoil plant substrate.
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Substrates & AquascapingUltum Nature Systems
The Crescent Shaped Bonsai Tree is a handcrafted aquarium driftwood bonsai tree for a dramatic, windswept aquascape look; artisans assemble natural driftwood into a balanced, structurally sound canopy. Attach aquatic mosses or small epiphytes to the canopy to create a lush underwater tree canopy. Crescent shape provides dynamic movement and a focal point over substrate and stones. Sizes 087S through 089L.
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Substrates & AquascapingUltum Nature Systems
Cueva Stone is a striking natural rock with a deep gray base patterned with white streaks and patches, creating a high-contrast, dramatic look for a hardscape; occasional rust-colored specks add unique character and the veining becomes bolder when wet. Also suitable for terrariums and paludariums for a rugged, weathered aesthetic. Natural product that may slightly alter water parameters. 10LB, 20LB, and 30LB packs.
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Substrates & AquascapingUltum Nature Systems
Dark Blue Slate Stone is a flat-profile natural rock with unique coloration that presents as dusty blue when dry but darkens considerably when submerged to reveal deep, moody tones; subtle brown streaking adds organic character. Flat shape offers stacking potential for taller structures or a level base to support driftwood. Also suitable for terrariums and paludariums. Natural product that may slightly alter water parameters. 5LB through 30LB packs.
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FilterUltum Nature Systems
The DELTA 120 Black Sponge is an authentic replacement mechanical filter insert engineered for the Ultum Nature Systems Delta 120 Aquarium Canister Filter; coarse 25 PPI pore structure traps large floating debris, plant matter, and fish waste as the first-stage mechanical protection. Custom precision-cut fit into the Delta 120 filter media caddy; durable, washable foam that supports beneficial bacteria colonization. Sponge insert only.
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FilterUltum Nature Systems
The DELTA 120 Gasket and O-Ring Set is an authentic factory replacement seal kit engineered for the Ultum Nature Systems Delta 120 Aquarium Canister Filter; molded to exact OEM dimensions for a seamless, leak-proof seal on the canister head and valve assemblies. High-grade elastomeric rubber resists drying, hardening, or cracking; restores vacuum and prime by preventing micro air leaks. Includes main canister head gasket and replacement O-rings for inflow/outflow valve connectors. Filter unit is separate.
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FilterUltum Nature Systems
The DELTA 120 Green Sponge is an authentic replacement mechanical and biological filter insert engineered for the Ultum Nature Systems Delta 120 Aquarium Canister Filter; optimized 30 PPI pore density balances trapping fine suspended particles with unrestricted water turnover. Dual mechanical and biological action captures organic waste and houses nitrifying bacterial colonies; custom precision-cut fit into the Delta 120 filter media caddy, durable washable foam. Sponge insert only.
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FilterUltum Nature Systems
The Delta 30/60 Activated Carbon Cartridge set is an authentic factory replacement chemical filtration media insert for the Ultum Nature Systems Delta 30 and Delta 60 Aquarium Canister Filters; high-grade activated carbon absorbs dissolved organic compounds, yellow water discoloration, foul odors, and residual medications. Precision fit for Delta 30 and 60 media trays; convenient two-pack. Two cartridges included; filter unit is separate. Freshwater and marine safe.
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FilterUltum Nature Systems
The DELTA 60 Black Sponge is an authentic replacement mechanical filter insert engineered for the Ultum Nature Systems Delta 60 Aquarium Canister Filter; optimized 30 PPI pore structure traps floating debris, plant matter, and waste as first-stage mechanical protection while allowing high-volume water turnover without rapid clogging. Custom precision-cut fit into the Delta 60 filter media caddy; durable washable foam that supports beneficial bacteria colonization. Sponge insert only; cut to fit the Delta 60 specifically.
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FilterUltum Nature Systems
The DELTA 60 Gasket and O-Ring Set is an authentic factory replacement sealing kit engineered for the Ultum Nature Systems Delta 60 Canister Filter; factory OEM precision fit restores watertight security on the canister filter motor head and valve assemblies. High-grade aquarium-safe elastomeric rubber resists dry rotting and maintains elasticity; prevents air leaks for consistent suction and easy priming. Includes main motor head perimeter gasket and hose connector/quick-disconnect valve O-rings. Seal kit only.
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FilterUltum Nature Systems
The DELTA 90 Black Sponge is an authentic replacement mechanical filter insert engineered for the Ultum Nature Systems Delta 90 Aquarium Canister Filter; coarse 25 PPI structure intercepts large particulate waste and leaf fragments as first-stage mechanical protection without restricting high turnover rates. Precision fit into the UNS Delta 90 filter media caddy; washable and reusable high-resilience foam. Sponge insert only.
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FilterUltum Nature Systems
The DELTA 90 Green Sponge is an authentic replacement mechanical and biological filter insert engineered for the Ultum Nature Systems Delta 90 Aquarium Canister Filter; optimized 30 PPI density traps fine suspended particles while maintaining unrestricted water flow through the canister chamber. Dual filtration action captures organic waste while housing beneficial nitrifying bacteria colonies; custom fit for the Delta 90 media caddy, reusable foam. Sponge insert only.
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FilterUltum Nature Systems
The DELTA Quick Release Double Tap Valves are heavy-duty inline quick-disconnect connectors for external canister filters and powerhead pumps in freshwater and marine aquariums; tool-free compression fittings allow instant shut off of water flow and disconnection of the canister filter or glass lily pipes with zero spillage. Dual shut-off levers with integrated precision flow control; durable impact-resistant ABS plastic; universal hose compatibility in 12/16mm and 16/22mm sizes.
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Substrates & AquascapingUltum Nature Systems
The Double Bonsai Tree Aquarium Driftwood - Extra Small pairs two distinct handcrafted trees on a single base to create immediate depth and a natural forest edge effect with a balanced, harmonious silhouette. Pairs beautifully with aquatic mosses and epiphytic plants for a lush, tiered canopy; a sophisticated focal point for planted aquarium hardscape. Three extra-small sizes: 72XS, 67XS, and 63XS.
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Substrates & AquascapingUltum Nature Systems
Natural Dragon Stone (Ohko Stone) aquascaping rock with a rugged dragon-scale texture in warm brown and red tones. Varied shapes and sizes build dynamic layouts while providing hiding spots and surface area for beneficial bacteria. Sold by weight; price shown for the largest size option.
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Substrates & AquascapingUltum Nature Systems
Dragon Stone, also known as Ohko Stone, is one of the most iconic natural aquascaping rocks; its scale-like texture, natural details, and crevices give hardscapes an aged, ancient look, displaying earthy colors from reds and yellows to deep browns. Its clay-like composition is relatively brittle and lets aquatic plants and mosses self-attach to its craggy surface; also suitable as a dramatic accent in terrariums and paludariums. Inert and will not influence water parameters. 10LB and 16LB packs.
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Substrates & AquascapingUltum Nature Systems
Dragon Stone (Ohko) Accent Stones add finer details and intricate textures to a hardscape; these smaller fragments feature the same iconic scale-like texture and earthy reds, yellows, and browns as full-sized stones in a size easier to manage for nanoscapes or detailed foreground work. Great stacking potential for miniature cliffs or filling gaps between larger boulders; clay-like composition lets aquatic plants self-attach. Also suitable for terrariums and paludariums. Inert and will not influence water parameters. Pieces 1-3 inches; approximately 2.2 lbs per bag.
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Substrates & AquascapingUltum Nature Systems
Dragon Wood is a rugged, ancient-looking aquarium driftwood named for its resemblance to Dragon Stone; it trades smooth lines for a chaotic, honeycomb-like structure packed with natural craters, deep crevices, and miniature tunnels. Use it for high-impact forest layouts or weathered riverbanks; the tunnels provide hiding spots for shy species like plecos and shrimp, and the wood naturally lowers water pH and hardness. Available as single, 3-pack, and 5-pack in sizes XS through XL.
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