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Find the gear behind the community's tanks.
Tanks, stands, lids
Canister filters, HOBs, protein skimmers, rollmats
Planted LEDs, high-actinic coral LEDs
Heaters, chillers, electronic controllers
Return pumps, wavemakers, gyres
Aquasoils, sands, dry reef rock, driftwood
Conditioners, RODI systems, marine salt mixes
Plant fertilizers, liquid CO₂, reef dosing pumps, calcium & alkalinity
Tools, food, testing, and the finishing touches
In community tanks
Chosen by aquarists
5,380 matching items · Most used first
OtherNeptune Systems
The Reef Casa 12 Gallon Tank Starter Kit is a 12-gallon all-in-one glass nano aquarium kit that includes the tank with built-in filtration, a 200 GPH return pump with plumbing and nozzle, self-leveling mat, 50W heater, 6 lbs of sand, dry rock, reef salt for 16 gallons, bacteria and ammonia chloride for cycling, filter floss, carbon, bio blocks, thermometer, hydrometer, and a choice of lighting.
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Wave GenerationJebao
The Jebao (Jecod) DCP-10000 is a DC return pump for saltwater and freshwater use (internal use only). Adjustable flow rate approx. 1720-2640 GPH, max head 6 m, 100W; wear-resistant ceramic shaft, 10-minute feed mode, electronic dry-run and jam protection.
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Wave GenerationNeptune Systems
Neptune Systems dual 2-liter cast-acrylic reservoir for two-part/liquid additives, connecting directly to a DOS or DOS QuietDrive dosing pump. Optical sensors report real-time fluid levels to Apex Fusion; includes tubing and sensors.
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OtherFlipper
Flipper 4-inch optical-grade magnifying viewer held to the glass by strong magnets (safe for glass/acrylic up to 5/8 inch). Ideal for checking corals and fish for disease or pests and for aquarium photography; 3 to 8 inch focal range.
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OtherFlipper
The Flipper DeepSee Clear Max 5" Magnified Viewer is an optical-grade magnifying lens that attaches magnetically to glass or acrylic up to 3/4" (20mm) thick, providing a 5-inch viewing portal with a 3-12 inch focal range. It is ideal for close-up disease and pest checks on corals and fish as well as aquarium photography, and accepts an optional orange filter lens (sold separately).
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OtherFlipper
The Flipper DeepSee Clear 4-inch magnified viewer is an optical-grade magnifying lens providing a 4-inch viewing portal for the aquarium. Held in place by strong magnets, it is ideal for disease and pest checks or aquarium photography; safe for glass and acrylic up to 5/8 inch (16 mm) thick, with a focal range of approximately 3 to 8 inches.
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OtherFlipper
Flipper DeepSee 4-inch magnetic magnifying viewer with optical-grade glass, held by rare earth magnets (tanks up to 5/8 inch thick). Gives a closer look at corals for everyday viewing or photography; 3 to 8 inch focal range.
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OtherFlipper
The Flipper DeepSee MAX 5-inch magnified magnetic viewer is made with optical grade magnifying glass, perfect for everyday viewing or aquarium photography, with a focal range of 8-12 inches to get a closer look at corals and observe pests or early signs of disease. It is held in place by strong rare-earth magnets compatible with tanks up to 3/4 inch thick; each side has a soft felt-like surface so it moves smoothly across glass or acrylic without scratching; for saltwater, freshwater, or dry enclosures.
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OtherFlipper
The Flipper DeepSee Nano 3" is a magnetic magnifying viewer with optical-grade glass for close-up viewing or photography of corals and livestock, with a focal range of 2-6 inches. It attaches with super-strong rare earth magnets (felt-lined on both sides for safe, smooth movement) and works on glass or acrylic tanks up to 3/8 inch (10 mm) thick.
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OtherHanna Instruments
Hanna Instruments ultra-pure deionized water for diluting samples in titration tests like the Hanna Calcium Checker. Keeps test results accurate and repeatable; available in 230mL and 3.78L sizes.
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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 & AquascapingAqua Natural
Aqua Natural Delta Sand is a coarse 0.8-1.2 mm sand with natural earthy tones for planted tank aquascaping, with minimal effect on water chemistry and high surface area for beneficial bacteria.
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Substrates & AquascapingAqua Natural
Aqua Natural Delta Sand Bio-Substrate (5 lbs) is seeded with live nitrifying bacteria (Nitrosomonas and Nitrobacter) to quickly cycle new freshwater aquariums, converting harmful ammonia to nitrates; use as a primary substrate or mixed 1:4 with dry substrate.
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FilterDeltec
The Deltec 2000i is an internal protein skimmer for reef aquariums of 1500 to 2000 liters, hand-built in Germany. It uses a 24V Deltec DCC 4 DC pump with a 10-stage controller, an emergency overflow that prevents cup flooding, and tool-less pump removal for fast cleaning.
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FilterDeltec
The Deltec 3000i Internal Protein Skimmer is a hand-built German cylinder-body skimmer for 525–790 gallon aquariums, with a DCC 5 DC pump, emergency overflow system, and tool-free disassembly.
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FilterDeltec
The Deltec 400i is an internal protein skimmer for aquariums of 100 to 400 liters, hand-built in Germany. It uses an adjustable 24V DC pump, an emergency overflow with water level indicator that prevents cup flooding, and a hollow footplate that reduces turbulence.
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FilterDeltec
The Deltec 6000i Internal Protein Skimmer is a German-built DC skimmer for aquariums of 790 to 1580 gallons, with a 15.5 x 13 x 22.5 inch footprint. It uses two DCC 5 DC 24V pumps with Sine Wave 5 controllers pulling 1900 L of air per hour at 38W, and includes an emergency overflow with water level indicator, micro water-level adjuster, air silencer, and tool-free pump removal.
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SupplementationDeltec
The Deltec KM500 Kalkwasser Stirrer produces a saturated solution of kalkwasser (limewater) to help maintain calcium, alkalinity, and pH in reef aquariums. Recommended for tanks up to 400 gallons, it produces 1.3 gallons of kalkwasser solution per hour, holds approximately 5 liters of water and 150 grams of calcium hydroxide, and can be installed in-sump or externally, stand-alone or alongside a calcium reactor.
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SupplementationDeltec
The Deltec KM500s Kalkwasser Stirrer produces saturated limewater to maintain calcium, alkalinity, and pH in reef aquariums up to 1,800 gallons, with a 500-gram kalkwasser capacity for in-sump or external installation.
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FilterDeltec
The Deltec VF10000 Fleece Roller Filter is an automatic mechanical filter for in-sump fresh or saltwater use, advancing a 150-foot fleece roll to remove suspended debris with up to 2,615 GPH flow.
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FilterDeltec
The Deltec VF5000 Fleece Roller Filter is a compact automatic mechanical filter for freshwater or saltwater sumps, handling up to 1,320 GPH with a 150-foot fleece roll that auto-advances as it clogs, measuring 13.5 x 8.5 x 20 in for 6.75-8.5 inch sump water depth.
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FilterDeltec
The Deltec VF8000 Fleece Roller Filter is a compact, high-flow (up to 2,115 GPH) mechanical filtration unit for freshwater or saltwater aquariums; it automatically advances a 150-foot fleece roll via a float switch to remove suspended debris before it becomes nitrate and phosphate, and comes fully assembled and ready for in-sump use.
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