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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
SupplementationCO2Art
CO2Art Clear CO2 Resistant Polyurethane Tubing (4/6 mm) provides a safe, reliable connection to CO2 equipment for planted aquariums; it is compatible with all CO2Art regulators and diffusers, available in 10 ft or 20 ft lengths and in clear, black, silver, green, or blue.
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FilterBulk Reef Supply
The BRS Clear Refillable Cartridge for DI Resin is a standard 10-inch (2.5" x 10") clear cartridge that can be emptied and refilled with mixed-bed or color-changing DI resin as needed. It fits all BRS RO/DI systems and most other systems that accept standard 10-inch cartridges.
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Water PurificationDr. Tim's Aquatics
DrTim's Aquatics Clear-Up Natural Water Clarifier is a 100% natural bacteria-based flocculant for freshwater aquariums that clears cloudy white water fast by clumping small particles together so they can be filtered out, with no chemicals or odors.
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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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Tank & FurnitureHelloReef
The HelloReef Clownfish & Anemone Aquarium Kit is a 15-gallon all-in-one saltwater starter kit designed for beginners. It bundles the glass aquarium, hidden rear filtration, LED light, return and circulation pumps, heater, sand, rock, food, salt, and test gear with step-by-step video courses for setup, cycling, and stocking.
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OtherFlipper
These filter sock silencers sit atop filter socks in a sump to lower the noise caused by water flowing into the socks, making mechanical filtration quieter. They are designed for Fiji Cube-style 4" filter sock trays and filter holders.
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SupplementationEHEIM
The EHEIM CO2 24V night shut-off for powerLED+ is a magnetic (solenoid) valve that switches off the aquarium CO2 supply overnight, for example during the sunset phase when connected to the EHEIM LEDcontrol+ lighting system, saving up to 50% of CO2. It operates silently, is maintenance-free, and includes a non-return valve and a 1.5 m cable.
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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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SupplementationTwinstar
Acrylic CO2 diffuser for planted aquariums that produces ultra-fine microbubbles through a microporous ceramic membrane for efficient CO2 dissolution. Shatterproof transparent body mounts with a suction cup; compatible with all standard CO2 systems.
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SupplementationEHEIM
The EHEIM CO2 diffuser 600 is a quality glass CO2 diffuser with a separate bubble counter and integrated non-return valve, for aquariums up to 600 litres. Its large diffuser area atomizes CO2 into fine bubbles for optimum, loss-free distribution, and it mounts space-savingly in the tank corner with two powerful suction holders.
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SupplementationDymax
The CO2 Disposable Cartridge Holder is a clear acrylic rim hanger bracket that suspends a lightweight mini disposable CO2 cartridge securely on the aquarium tank rim, eliminating the risk of a top-heavy cylinder tipping over and damaging the regulator; it lifts the cartridge completely off the tabletop and guarantees the cylinder stays upright so liquid CO2 does not flood the regulator's internal seals. Ultra-clear, low-profile transparent lab-grade molded acrylic; designed exclusively for standard 95g threaded mini disposable CO2 cartridges.
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SupplementationCO2Art
The CO2Art CO2 Drop Checker Kit is an ultra-clear low-iron glass drop checker (1.18 in diameter, 2.16 in tall) with pre-mixed drop checker solution and suction cup mount, providing a visual indicator of dissolved CO2 levels in injected aquariums.
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SupplementationISTA
ISTA CO2 Indicator for planted aquariums, providing a visual indication of CO2 concentration to help maintain ideal conditions for aquatic plant growth. Includes the indicator, a 10cc bottle of CO2 indicator solution, and a suction cup mount.
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SupplementationISTA
This 10cc bottle of ISTA CO2 Indicator Solution is the refill reagent for the ISTA CO2 Indicator, changing color to reflect dissolved CO2 concentration in planted aquariums. It is also compatible with other brands of CO2 indicators and drop checkers.
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SupplementationEHEIM
The EHEIM CO2 magnetic valve 24V is a solenoid valve that acts as a night shut-off for a CO2 system, and can also be used with CO2 systems from other brands. It connects to the EHEIM PowerLED+ power supply, runs on safe 24V low voltage, is maintenance-free and quiet in operation, and includes a non-return valve.
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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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SupplementationNot specified
The CO2 Perma-Seal O-Ring is a high-pressure permanent cylinder connection washer engineered for standard North American CGA-320 CO2 gas cylinders; it replaces flimsy disposable plastic washers with a heavy-duty permanent seal that never requires routine replacements, guarding against catastrophic gas leaks and keeping the dosing rate rock-solid. Installs with a standard Allen wrench before threading on the regulator. Compatible with UNS Mini and UNS Pro Dual Stage Regulators. 1 Pack through 20 Pack.
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SupplementationNot specified
CO2 Proof Tubing - Black is a durable polyurethane tubing designed specifically for use with CO2 regulators; unlike regular airline tubing, it prevents CO2 from permeating through the membrane. Precise fitting onto the regulator's output line prevents the tubing from popping off under high pressure. 4mm inner / 6mm outer diameter. 5 Ft or 10 Ft.
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SupplementationNot specified
CO2 Proof Tubing - Blue is a durable tubing designed specifically for use with CO2 regulators; unlike regular airline tubing, it prevents CO2 from permeating through the membrane. Precise fitting onto the regulator's output line prevents the tubing from popping off under high pressure. Designed for UNS Pro and Mini Dual Stage Regulators. 4mm inner / 6mm outer diameter. 5 Ft or 10 Ft.
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SupplementationNot specified
CO2 Proof Tubing - Clear is a durable polyurethane tubing designed specifically for use with CO2 regulators; unlike regular airline tubing, it prevents CO2 from permeating through the membrane. Precise fitting onto the regulator's output line prevents the tubing from popping off under high pressure. 4mm inner / 6mm outer diameter. 5 Ft or 10 Ft.
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OtherNot specified
The CO2 Quick-Connect Dual Adapter is a cola-bottle-cap style adapter with an air diffuser for DIY CO2 reactors in planted aquariums. It screws directly onto a beverage bottle to form a simple sealed connection, and the corrosion-resistant cap is safe for fish and aquatic plants.
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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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SupplementationTunze
Tunze 7077.3 CO2 regulator providing precise pressure control for standard CGA 320 CO2 cylinders, made in Germany. Features tool-free hand-tight installation, dual gauges displaying cylinder and working pressure, a fine adjustment screw, and an integrated pressure-relief valve.
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FilterWavereef
The WaveReef CO2 Scrubber (CO-100, with 1 kg CO2 adsorption media included) enhances pH stability by recirculating air through the protein skimmer in a closed-loop system. Re-uses air processed by the skimmer, effectively locking away excess CO2 and fostering a healthier aquatic ecosystem.
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EHEIM
The EHEIM CO2 SET400 is a complete reusable CO2 fertilization system for aquariums, supplied without the bottle. It includes a precision pressure reducer with manometers and precise dosing valve, a 360-degree rotating hose connection, 3 m of pressure-resistant CO2 safety hose, a safety diffuser with bubble counter and non-return valve, water test strips, and a CO2 long-term test with indicator reagent for permanent CO2 measurement.
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SupplementationISTA
The ISTA CO2 Starter Set is an affordable, beginner-friendly CO2 system for nano planted aquariums that uses a disposable CO2 can (no refilling). The set includes the disposable CO2 can, tubing, check valve, CO2 diffuser, and 2 suction cups; the diffuser should be placed at the bottom of the tank for best diffusion.
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SupplementationISTA
ISTA CO2 Supply Set with a 45g pressurized CO2 cartridge, designed as a hassle-free CO2 solution for nano tanks and first-time CO2 users. Includes the cartridge, supporting rack, regulator, 2-in-1 CO2 diffuser and bubble counter, and tubing.
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SupplementationARCHAEA
The CO2 system kit with ARCHAEA AccuPRO II Compact CO2 dual gauge regulator includes the AccuPRO II regulator, AccuPRO metal bubble counter (screw-on type), a brand-new 5 lb or 10 lb aluminum CO2 cylinder, ADA clear parts set, ADA CO2 pressure-proof tubing, and a Twinstar New CO2 diffuser. A complete CO2 supply system for planted aquariums; the aluminum cylinders are supplied unfilled and can be refilled locally.
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SupplementationARCHAEA
The CO2 system kit with Archaea CO2 regulator (PRO) single gauge includes the regulator, AccuPRO metal bubble counter (in-line type), a brand-new 5 lb aluminum CO2 cylinder, ADA clear parts set, ADA CO2 pressure-proof tubing, and a Twinstar New CO2 diffuser Medium. A complete CO2 supply system for planted aquariums; the cylinder is supplied unfilled and can be refilled locally.
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FilterBulk Reef Supply
5 lb aluminum CO2 tank with a high-quality brass valve for high-tech planted aquariums. Provides a stable CO2 supply to promote lush plant growth; lightweight and corrosion-resistant, is sold empty and must be filled before use.
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