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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
LightsAquaIllumination
The Aqua Illumination Prime Flex Arm is a 12" flexible mounting arm designed exclusively for AI Prime LED lights, clamping to rimmed or rimless tank rims up to 1.20" (30mm) thick. Its silicone-coated flexible arm resists moisture, includes wire-management clips, and a set-screw base allows the light to be leveled flat; this listing is an open-box unit.
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LightsAquaIllumination
The AquaIllumination Prime Flex Arm is a flexible mounting arm designed exclusively for AI Prime LED lights. The silicone-coated arm fits rimmed or rimless aquarium rims up to 1.2 inches, includes wire-management clips for the power cord, and secures the light with a set-screw base system.
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LightsAquaIllumination
The Aqua Illumination Prime Flex Arm (18 inch) is a flexible gooseneck mounting arm for AI Prime LED light fixtures. It clamps to the aquarium rim and its bendable arm lets the light be positioned at the ideal angle and height over the tank.
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LightsAquaIllumination
The AquaIllumination AI Prime Hanging Kit in black is a simple, elegant solution to suspend the AI Prime LED light above an aquarium. The unique ball joint makes it easy to tilt, turn, and adjust the light to coral preference, and the kit is made from high quality aluminum with a black suspension bar.
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LightsAquaIllumination
The AquaIllumination Prime Tank Mount is an elegant mounting solution for AI Prime lights on rimmed and rimless tanks. It features an integrated ball joint for tilting, turning, and adjusting light position, with high-quality brushed aluminum available in black or silver; max tank thickness 1.25 inches, light not included.
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OtherOcean Nutrition
Ocean Nutrition Prime Reef is a gourmet frozen fish food blend of seafood, zooplankton, and algae for reef aquariums, feeding fish, corals, and invertebrates in bite-sized no-binder cubes.
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OtherOcean Nutrition
Ocean Nutrition Prime Reef Flakes is a 2.5-ounce gourmet flake food for reef aquariums, rich in seafood and zooplankton. The highly digestible flakes provide marine proteins that support the health and coloration of carnivorous and omnivorous fish and invertebrates.
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LightsAquamaxx
The AquaMaxx Prism II Pro Stand L is a stable brushed-silver tank mount for 36-48 and 48-60 inch Prism II Marine and Planted LED fixtures, fitting rims up to 0.78 inches thick with a 10-inch stand height.
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SupplementationAquaforest
Aquaforest Pro Bio F (25 mL) is a probiotic bacterioplankton culture medium that stimulates bacterioplankton growth to reduce nitrate and phosphate while feeding corals; dose 1 spoonful per 100 L daily.
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SupplementationAquaforest
Aquaforest Pro Bio S is a highly concentrated probiotic bacteria blend for saltwater aquariums that converts phosphate, nitrate, and organic compounds into biomass removable by a protein skimmer or consumable by corals. It reduces organic sediment on rocks and media, creates a natural biological filter against pathogenic microflora, and supports tank health at one drop per 100 liters daily.
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FilterPro Clear Aquatic Systems
A refillable chemical media cartridge designed for Pro Clear Aquatic Systems RedFlex sumps; it sits in the sump's chemical media canal to hold chemical filtration media of your choice.
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OtherPro Clear Aquatic Systems
The Pro Clear Auto Top-Off Reservoir Tank (10 gallons, 14.5 x 10 x 16 in) is a durable, transparent water basin for maintaining sump water level against evaporation; it features a removable lid for easy access, clear sides for water-level visibility, and two holes in the top for the pump power cord and tubing.
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OtherPro Clear Aquatic Systems
The Pro Clear Auto Top-Off Reservoir Tank (6 Gallons) is a clear acrylic ATO container with a removable lid and two top openings for the pump cord and tubing, maintaining sump water level against evaporation.
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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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OtherWavereef
The WaveReef PRO Internal Turf Scrubber (AGS-200pro) is a powerful natural filtration solution for reef aquariums. Uses algae-based nutrient export to remove nitrate, phosphate, and organic waste, maintaining clean and stable water without relying heavily on chemical filtration.
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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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OtherTropic Marin
The Tropic Marin Pro Nitrite and Nitrate Test Kit measures nitrite (0-2 ppm) and nitrate (0.5-50 ppm) concentrations in fresh and saltwater aquariums using a finely-tuned color chart. The kit includes reagents for up to 50 tests along with syringes, a glass cuvette, and a reference standard.
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Water PurificationTropic Marin
Tropic Marin Pro Reef Salt is a pharmaceutical-grade sea salt mix with balanced calcium (440 ppm), magnesium (1350 ppm), and alkalinity (7 dKH) plus 70 trace elements, suited for reef aquariums including calcium reactor systems.
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FilterBulk Reef Supply
BRS PRO Series Anion Single Bed Color Changing DI Resin is great for people that want to be more efficient with their deionization resin usage. Available in 1.4 lb single cartridge refill and 8.1 lb bulk package (up to 6 refills); changes from blue to amber when exhausted.
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FilterBulk Reef Supply
The BRS PRO Series Cation DI Resin (Color Changing, Part 1) is a single-bed cation deionization resin that removes positively charged ions (sodium, calcium, magnesium, aluminum, iron) as the first stage of an efficient 3-stage DI setup, producing 0 TDS water for reef and freshwater aquariums. The purple-to-amber color change signals exhaustion; available as a 1.25 lb single-cartridge refill or 8.1 lb bulk package in foil-lined, vacuum-sealed bags.
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FilterBulk Reef Supply
BRS PRO Series Mixed Bed DI Resin (Color Changing) - Part 3 is a 1.25-pound refill of mixed-bed deionization resin for RO/DI systems. It changes from purple to amber when exhausted and polishes reverse-osmosis water down to 0 TDS by removing remaining ions such as calcium, magnesium, silica, and phosphate.
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OtherFluval
Fluval Pro Vac powered aquarium gravel cleaner with mains-powered suction (no batteries), a two-speed motor, dual-density filter pad that traps large and fine waste particles, and an LED spotlight for dark corners. Includes an extender nozzle for deeper aquariums, quick-release filter cartridge, gravel guard, and a water change adapter; suitable for fresh and saltwater tanks 10 inches or deeper.
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OtherNeptune Systems
The Neptune Systems Probe Calibration Kit includes everything you need to calibrate your pH and salinity probes for reef tank conditions; single-use packets make calibration easy and only require clean water to rinse the probe between calibrations. Includes 1x 7.0 pH packet, 1x 10.0 pH packet (two-point calibration for single/double junction pH probes), and 1x 53,000 uS salinity packet replicating 35 ppt conductivity.
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OtherReef Factory
The Reef Factory Probes Multi Holder holds up to 5 Reef Factory probes and sensors with adjustable height (9-10.7 in) and a sleek, low-profile design that keeps probes securely fastened and the sump area tidy.
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OtherPython
The Python Pro-Clean 1-inch Small is a gravel vacuum and water change system with a 1-inch diameter opening, 6-inch gravel tube, and 6 feet of clear vinyl tubing, designed to make water changes quick and easy. High-quality fittings at an affordable price make it a durable tool for keeping freshwater and saltwater tanks clean.
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OtherPython
The Python Pro-Clean Gravel Wash is a siphon water-change kit with a squeeze-ball starter that primes the siphon with a few pumps, making gravel cleaning and water changes simple. It includes 6 feet of tubing and comes in Medium (10" gravel tube for 10+ gal tanks) or Large (16" tube for 50+ gal tanks), both with 2" diameter tubes.
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Tank & FurniturePro Clear Aquatic Systems
The Pro Clear Aquatic Systems ProClear Cylinder 125 is a 103-gallon fully plug-and-play acrylic cylinder aquarium with built-in sump filtration, submersible pump, remote-controlled RGB LED lighting, and a water-resistant hardwood stand.
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Tank & FurniturePro Clear Aquatic Systems
The ProClear Cylinder 80 Aquarium & Stand (53 Gallons) is a cylindrical aquarium system with stand, pre-plumbed filtration with submersible pump, included RGB LED lights, and water-resistant coated hardwood framing with acrylic overlays for saltwater or freshwater setups.
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SupplementationTropic Marin
Tropic Marin Pro-Coral A- Trace 2 is a ready-to-dose liquid supplement of essential anionic trace elements (bromine, fluorine, iodine, lithium, molybdenum, selenium, vanadium) for reef aquariums. Paired with Pro-Coral K+ Trace 1, it replenishes trace elements depleted by coral growth at 1 mL per 100 L daily, supporting natural coral color and growth (available in 200 mL, 500 mL, and 1000 mL).
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