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In community tanks
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465 matching items · Most used first
Substrates & AquascapingUltum Nature Systems
Madra Wood is a rugged, sculptural aquarium driftwood with intricate knots, deep whorls, and weathered texture, ideal as a centerpiece or accent in planted tanks. Its grooved surface is excellent for anchoring mosses, ferns, and Bucephalandra, and it pairs well with Seiryu or Dragon Stone; rinse and soak or boil before use to waterlog it and manage tannins.
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Substrates & AquascapingUltum Nature Systems
Manten Stone is a popular natural rock found in high-elevation Asian mountain ranges, where centuries of erosion and pressure have forged its iconic rugged edges, deep textures, and varied colors. Extremely sought after for its ability to recreate extreme realism, this natural stone is a favorite for Iwagumi layouts or creative mountainscapes. Its unique cracks and craggy surfaces provide an ideal surface for attaching mosses or using greening techniques to add maturity to the hardscape. Also suitable for terrariums, paludariums, or similar planted enclosures for an authentic, weathered look. Average size ranges from 2 to 10 inches. Sold in 10LB, 20LB, and 30LB options.
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Substrates & AquascapingUltum Nature Systems
Maple Leaf Stone is a striking natural rock featuring a warm reddish-brown color and a fascinating web-like honeycomb or leaf-vein patterning. It provides beautiful color contrast against vibrant green aquatic plants, perfect for dramatic canyon-style layouts or as a warm, textured hardscape centerpiece. Also suitable for terrariums, paludariums, or similar bioactive enclosures. Pieces range from 3-12 inches. Available in 10lb ($44.99) and 20lb ($74.99) packs.
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Substrates & AquascapingUltum Nature Systems
Marsh Stone is a natural rock comparable to Hakkai Stone with a lighter color palette of light grey and white tones. It features smoother, semi-rounded edges and a water-worn shape, perfect for authentic river-style aquascapes. Its grooves and crevices are ideal for attaching aquarium mosses or epiphytic plants. Suitable for Iwagumi layouts or mixed hardscapes, and works beautifully in terrariums and paludariums. Available in 5, 10, 15, 20, and 30 pound options.
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FilterUltum Nature Systems
The Mighty Aquarium Filter HOB is a compact, hang-on-back filter available in five distinct sizes engineered for freshwater tanks ranging from 1 to 24 gallons. Designed for quick rim mounting, this unit delivers clear, oxygen-rich water while keeping operational noise to a minimum. Features integrated leveling knob, adjustable flow control, self-priming design, and comes preloaded with filtration media plus an extra replacement set.
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Substrates & AquascapingUltum Nature Systems
Mopani Wood is an African hardwood famous for its extreme density and striking two-toned contrast of sandy tan and deep chocolate brown. Because it is so dense, it typically sinks immediately, and its exceptional hardness means it breaks down much more slowly than other driftwoods for a long-lasting hardscape foundation.
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Substrates & AquascapingUltum Nature Systems
Mountain Stone is a relatively new addition to the world of aquarium hardscaping, offering a unique blend of characteristics from some of the most popular stones in the hobby. Light in coloration, this natural stone is comparable to Dragon Stone in its warm, earthy tones, yet it is exceptionally lightweight, similar to Lava Rock. Its craggy shapes and almost sand-like textures are a perfect pick for creating dramatic cliffs and high-altitude mountainous scenes. Pairs well with deep green mosses and vibrant red aquatic plants for high contrast. Also suitable for terrariums, paludariums, or similar bioactive enclosures. Sold in 10LB and 20LB packs.
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Substrates & AquascapingUltum Nature Systems
Nano-sized Horn Wood, a dense, high-character natural driftwood with warm tones and bold, antler-like protrusions, averaging 4-10 inches. The sharp, clean lines provide contrast and drama for focal points, while the rough, aged texture is tailor-made for attaching aquatic mosses, ferns, or Bucephalandra. Many pieces feature flat bases or sturdy trunks for easy stacking. Available in 5-pack and 10-pack; expect natural variations in shape, weight, and character.
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Substrates & AquascapingUltum Nature Systems
Spiderwood is known for its wild, multi-branching shape that instantly adds depth and personality to any aquascape. This Nano version is specifically selected for those twisting tangles and sculptural turns that fit perfectly into smaller tanks. Whether you stand it upright, lay it on its side, or angle it, each orientation creates a fresh visual story. The complex network of branches adds immediate depth and energy without overwhelming the tank, and the spindly limbs are ideal for anchoring mosses, Bucephalandra, or Anubias Nana Petite. Available as single, 5-pack, or 10-pack; pieces range from 3 to 8 inches.
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Substrates & AquascapingUltum Nature Systems
Natural Reef Rock Coralline features naturally irregular formations with a coralline-covered surface that gives each piece an authentic reef-rock appearance. The varied shapes and textures make it a versatile foundation for natural-looking saltwater and reef hardscapes; individual pieces can be combined into larger formations with caves, crevices, and varying elevations.
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Substrates & AquascapingUltum Nature Systems
Natural Reef Rock Premium is a bright white, highly porous rock designed for marine and reef aquariums. Its intricate open structure provides plenty of surface area for beneficial bacteria and coral attachment, and the naturally irregular lightweight pieces are ideal for building a natural reef hardscape with depth, texture, and open spaces; sold in a 30LB pack.
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Substrates & AquascapingUltum Nature Systems
Natural Reef Shelf Rock Coralline features naturally formed shelf-like pieces with a coralline surface and a layered structure that mimics established reef rock. The broad, overhanging surfaces are ideal for creating ledges, shaded areas, and changes in elevation; pieces can be arranged into larger reef structures or mixed with other reef rock for a varied, natural layout.
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Substrates & AquascapingUltum Nature Systems
Ultum Nature Systems Controsoil Black (Normal, ~5mm granules) is a Japanese aqua soil made of natural soil and volcanic ash that buffers water to a slightly acidic pH around 6.8, releases low ammonia for safer new-tank cycling, and provides nutrient-rich, no-rinse granules ideal for planted freshwater aquariums, fish, and shrimp.
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Substrates & AquascapingUltum Nature Systems
Normal Controsoil Brown is a natural aquarium soil substrate from Ultum Nature Systems in a brown tone for planted tanks. The nutrient-rich granules support plant root growth, and the normal grain size suits aquascaping layouts.
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Substrates & AquascapingUltum Nature Systems
Natural driftwood from Ultum Nature Systems for freshwater aquascaping, similar to Malaysian driftwood but with lighter coloration and less uniform, varied shapes and textures. Each unique piece provides hiding spots that reduce fish stress, and the wood releases tannins that help soften water like tropical fish habitats; soaking before placement minimizes initial tannin release and helps it sink.
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Substrates & AquascapingUltum Nature Systems
A rugged, chunky natural aquarium driftwood stump with a weathered, river-washed surface full of gnarly knots and deep textures. Acts as a heavy anchor to ground substrate slopes and lock down supporting stones, while its craggy exterior gives epiphytes like Anubias and Bucephalandra grip and provides surface area for beneficial bacteria and biofilm for shrimp and bottom-dwellers. Available in Small (8-12 in), Medium (12-16 in), Large (16-20 in), and XL (20-24 in); may float initially and release tannins, so soak or boil before use.
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Substrates & AquascapingUltum Nature Systems
Pacific Driftwood brings a mature, untamed character to the planted tank with deep knots, weathered tangles, and an aged river-worn look. Each piece is a unique puzzle of textured paths and hollowed grooves ideal for dramatic river roots or wild jungle layouts. The knots and tangles provide hiding spots for fry and shrimp plus surface area for beneficial bacteria. Available from XS to XL in single, 3-pack, 5-pack, and 10-pack options.
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Substrates & AquascapingUltum Nature Systems
Patagonia Stone is a porous, roughly textured natural rock with a rugged lava-stone-like aesthetic in earthy rust and brown hues, creating warm contrast against green plants. Its creviced texture is ideal for mountain hardscape layouts and for attaching mosses and epiphytic plants; sold in 10 and 20 lb packs and should be rinsed before use.
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Substrates & AquascapingUltum Nature Systems
Petrified Wood is a remarkable natural stone formed from the fossilized remains of ancient trees, where organic materials have been replaced by minerals over millions of years. This results in a dense rock retaining the intricate grain patterns and textures of the original terrestrial vegetation. Its earthy tones and vertical wood-like structures make it a good pick for forest or sunken timber-inspired hardscape layouts. Also suitable for terrariums, paludariums, or similar planted enclosures for a prehistoric, woodland aesthetic. Available in 5LB ($23.99), 10LB ($44.99), 20LB ($74.99), and 30LB ($99.99) packages.
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OtherUltum Nature Systems
A 3D printed Pod Hotel for growing a copepod or amphipod colony, ideal for saltwater reef tanks, refugiums, and sump systems. Its simple, clean design features plenty of crevices, providing a safe, predator-free zone for copepods, amphipods, and other beneficial microfauna to hide, breed, and thrive. Use it to seed a new reef aquarium or nurture live food sources for picky eaters. Compact, easy to clean, and mess-free; 2 x 2 x 3.6 inches, white, made from reef-safe PETG.
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SupplementationUltum Nature Systems
The Ultum Nature Systems Pro CO2 Manifold Block is a modular add-on that attaches to the UNS Pro Dual Stage CO2 Regulator so a single CO2 cylinder can feed multiple planted aquariums. It combines a detachable bubble counter, built-in check valve and precise needle valve to give each additional tank independent bubble-count control with backflow protection.
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SupplementationUltum Nature Systems
The Ultum Nature Systems Pro Dual Stage CO2 Regulator is a professional-grade CO2 delivery system for planted aquariums, with two gauges for monitoring output pressure and remaining CO2, a failsafe dual-stage mechanism, integrated bubble counter, and solenoid for simple, precise CO2 dosing. It fits standard CGA-320 CO2 cylinders and features a bubble counter manifold that can be expanded with manifold blocks to distribute CO2 to multiple aquariums from one cylinder; includes extra O-rings, bubble counter, Allen key, CGA-320 adapter, and power adapter.
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SupplementationUltum Nature Systems
The Ultum Nature Systems Pro Mini Dual Stage CO2 Regulator is an all-in-one CO2 delivery solution for planted aquariums. It features a dual stage failsafe mechanism, built-in solenoid, and included bubble counter for simple, precise CO2 management, and works with standard CGA-320 CO2 cylinders and paintball canisters. Includes adapters, extra washer O-rings, allen key, and power adapter.
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Substrates & AquascapingUltum Nature Systems
Red Manten Stone is a popular aquascaping stone recognized for its rich red-brown color, rugged texture, and naturally layered appearance. Its warm, earthy tones add contrast and dimension to planted aquariums, and it pairs beautifully with green plants and mosses.
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Substrates & AquascapingUltum Nature Systems
Red Petrified Wood is a natural stone formed from the fossilized remains of ancient trees and terrestrial vegetation. Over millions of years, organic materials have been replaced by minerals to create a dense, beautiful stone that retains the intricate grain and character of its prehistoric origin. This variety features deep brick-reds and warm earthy tones, perfect for recreating a submerged redwood forest. Also suitable for terrariums, paludariums, or bioactive enclosures. Pieces range from 5-12 inches. Available in 10lb ($44.99), 20lb ($74.99), and 30lb ($99.99) packs.
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Substrates & AquascapingUltum Nature Systems
Red River Slate is a natural red rock with occasional brown and white streaks and a semi-smooth finish. The coloration becomes significantly bolder when wet, showcasing a vibrant red color that provides a visually striking contrast when used with lush green plants in an aquascape. This stone has great stacking potential due to its relatively flat shape, making it an excellent choice for creating river or lake-inspired layouts or a waterfall effect in paludariums and terrariums. Also suitable for any planted enclosures. Stones vary in shape, size, and density. Sold in 5LB, 10LB, 20LB, and 30LB options.
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FilterUltum Nature Systems
The Red Sea Roller Mat Adapter converts the first chamber weir of a UNS R System into a funnel for the Red Sea ReefMat. Built from reef-safe 3D-printed PETG, the R60-90 adapter attaches directly with the included nut and fits the Red Sea ReefMat 250, while the R120-180 adapter uses the included female thread with the ReefMat 500's soft tubing.
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FilterUltum Nature Systems
The Reef Factory Roller Mat Adapter converts the first chamber weir of a UNS Reef System into a funnel for the Reef Factory Smart Roller, with a spout that fits directly into the roller's PVC elbow. Made from reef-safe 3D-printed PETG, it is available in R60, R90, R120, R150, and R180 sizes matched to each UNS Reef System model.
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FilterUltum Nature Systems
The Reef Factory Smart Roller is an automatic fleece-roll mechanical filter that replaces traditional filter socks, removing particles from aquarium water for crystal-clear clarity with reduced daily upkeep. It is app-controlled for monitoring fleece lifespan, usage, roll length, and timers, installs on the sump floor or rim, and comes in Small (up to 132G) and Medium (up to 400G) sizes compatible with UNS Reef Systems.
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Substrates & AquascapingUltum Nature Systems
Rhino Stone is a rugged, gray-colored rock blended with cream and brown hues. The neutral color palette of this stone complements flora of all colors well. Its versatile texture and organic shape make it an ideal pick for tanks for building dramatic rock formations to designing a balanced, natural-looking hardscape. Rhino Stone is also suitable for non-aquarium use and will work beautifully as an accent in terrariums, paludariums, or similar planted enclosures. Available in 5, 10, 20, and 30 pound packs.
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