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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
OtherRod's Food
Rod's Food Original Blend is an all-in-one frozen nutrient source (2 or 6 oz flat packs) with whole seafood, plankton, seaweed, vegetables, and omega-3s for fish, corals, and filter feeders in reef and fish-only tanks.
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SupplementationAquario
The AQUARIO Original CO2 Diffuser disperses CO2 in fine bubbles for optimal absorption, available in Small (12mm, up to 25 gallons), Medium (17mm, 25-50 gallons), and Large (24mm, 50+ gallons). Each includes the diffuser and two suction cup mounts for easy installation.
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Substrates & AquascapingCaribSea
CaribSea Ocean Direct Original Grade is a live aragonite reef sand (grain size 0.25-6.5mm) preserved with Sea Breathe technology so it retains its natural ocean bacteria for a faster tank cycle. Its high surface area supports beneficial bacteria colonization, and BRS suggests about 1 pound per 2 gallons of display volume (sold in 20 lb and 40 lb bags).
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FilterBulk Reef Supply
The BRS 10" RO Canister O-Ring is a replacement seal for Bulk Reef Supply RO/DI filter canisters that have become lost or damaged, restoring a leak-free seal. Old-style canisters (visible threads through the clear housing) use one o-ring; new-style canisters (thicker white cap, no visible threads) use two.
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FilterBulk Reef Supply
Replacement O-ring for the old-style BRS 10" reverse osmosis filter canisters, restoring a watertight seal between the canister housing and sump. Fit can vary slightly across 10" canisters due to manufacturing differences, and it is also compatible with BRS GFO and carbon reactors.
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OtherNeptune Systems
An optical liquid level sensor from Neptune Systems that plugs into the FMM module of an Apex aquarium controller. Using reflected infrared light, it detects wet/dry state changes to monitor sump, reservoir, or storage container levels, enabling custom auto top-off builds, high-level warnings, and low-water alarms. Includes a fastening nut and silicone washer with a 10-foot cable.
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Substrates & AquascapingLiquid Gardens
Liquid Gardens Osmocote Root Tabs (20 count) are nutrient-rich substrate tablets that provide a long-lasting nutrient source for planted freshwater aquariums, lasting up to 6 months; insert deep next to plant roots, one tab every 6 inches.
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OtherTunze
The Tunze Osmolator 3 is an automatic top-off system that maintains a stable water level using a precision optical sensor (0.5 mm accuracy) and an independent thermal overfill safety sensor, paired with a quiet 12V Turbelle High Jet 5030 dosing pump offering up to 20 ft of delivery head and dry-run protection.
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OtherTunze
A component for replacing evaporated aquarium water.
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OtherTunze
The Tunze Osmolator 3 Nano (3155) is an auto top-off system that maintains perfect water levels with an optical sensor backed by a redundant float switch. It includes audible and visual alarms, run-dry protection, a metering pump, and strong magnetic mounts, with a 5-year warranty.
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OtherTunze
The Tunze Osmolator 3 Nano is an automatic top-off (ATO) system that keeps water levels stable in aquariums up to 66 gallons using a precision optical sensor accurate to 0.5 mm, plus an independent thermal safety sensor to prevent overfilling. It includes a quiet Turbelle High Jet 5030 dosing pump with run-dry and blockage protection and up to 20 feet of delivery head height, a 12V power supply, 3 meters of tubing, and magnetic mounts for glass up to 12 mm thick.
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OtherOXO Good Grips
OXO Good Grips 6-piece measuring cups set (1/4 cup to 1 cup plus a scraper) snaps together for compact storage. Features soft non-slip handles, color-coded easy-read markings, half-measurement lines inside each cup and a levelling scraper with hanging hook; dishwasher safe.
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OtherOXO Good Grips
OXO Good Grips 7-piece liquid measuring beaker set (1 tsp, 1 tbsp, 1 oz, 2 oz, 1/2 cup, 2/3 cup, 1 cup) makes small liquid measurements easy for aquarium dosing and maintenance. Funnel shape with spout, rubber non-slip bottom, easy-read markings, nests for storage, dishwasher safe.
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OtherSalifert
The Salifert Oxygen Profi-Test is an extremely fast test that measures oxygen levels in just a few minutes, scaled from 2-14 mg/L; sufficient for 40 tests. Corals and marine fish require very high oxygen concentrations because of the low solubility of oxygen in salt water, so regular oxygen testing is important; usable in marine, freshwater, and garden pond water.
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OtherReef Nutrition
Reef Nutrition Oyster-Feast is a refrigerated coral food of oyster eggs and ovarian tissue, high in protein and omega-3 fatty acids, with particles from 1 to 200 microns suitable for SPS and LPS corals and other invertebrates; dose 1-2 teaspoons per 100 gallons per day, available in 6, 16, and 32 oz bottles.
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FilterOzotech
The Ozotech Ozone Air Dryer Gen 2 (DI-Air Dryer 2.0) removes humidity from the air going into an ozone generator to maximize ozone output and extend generator life. Its rechargeable silica gel beads change color when exhausted and can be recharged by baking in an oven or in sunlight.
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FilterMiscellaneous
Ozone Resistant Flexelene is economical pre-cut tubing suitable for ozone concentrations up to 1% by weight typically used in aquariums. It is significantly more flexible than standard polyethylene tubing, stays flexible to -40°F, has a high working temperature of 170°F, contains no plasticizers, and is certified to NSF Standard 51 for food and beverage use and NSF Standard 61 for drinking water use. Available as continuous pieces in 3/16, 1/4, 3/8, and 1/2 inch ID sizes in 10 and 20 foot lengths.
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OtherMiscellaneous
Economical ozone-resistant tubing sold by the foot for aquarium ozone setups, rated for ozone concentrations up to 1% by weight. It is flexible to -40F, handles working temperatures to 170F, contains no plasticizers, is more flexible than standard polyethylene tubing, and carries NSF Standard 51 and 61 certifications.
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FilterOzone Kynar Fittings
The Ozone Resistant Kynar Barb Union is a PVDF hose-barb fitting for connecting two segments of ozone-carrying tubing. Made from ozone-resistant Kynar, it does not degrade like nylon fittings and is used in ozone reactors and ozonizer plumbing.
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OtherOzone Kynar Fittings
The Ozone Resistant Kynar Nipple is a male NPT threaded nipple made from Kynar, which resists degradation from ozone gas where nylon fittings fail. It is offered in 1/4, 3/8, 1/2, 3/4, and 1 inch sizes for coupling ozone reactors and other ozone-exposed plumbing.
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FilterOzone Kynar Fittings
An ozone-resistant Kynar tee fitting for joining three tubes in ozone equipment; Kynar withstands high ozone concentrations where materials like nylon would quickly melt. Available in 3/16, 1/4, 3/8, and 1/2 inch sizes.
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FilterOzone Kynar Fittings
The Ozone Resistant Kynar Y is an inexpensive 1/4-inch Y fitting made from ozone-safe Kynar; it is the material of choice for ozone applications, since materials like nylon degrade in high ozone concentrations.
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Wave GenerationPython
This ozone-safe air line tubing is made from a non-toxic, FDA-approved, ozone-safe material in clear/blue that will not yellow over time. With a 3/16-inch inside diameter it fits most standard air pumps and ozone generators; sold by the foot, with longer lengths shipped as a single piece.
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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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OtherRod's Food
Rod's Food Pacific Plankton Blend (6 oz) is a frozen food of small saltwater krill (Euphausia sp.) similar in size to large mysis shrimp, rich in natural omega-3 fatty acids and astaxanthin; thaw and feed occasionally as a diet supplement for marine fish and corals.
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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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OtherReef Nutrition
Reef Nutrition Pac-Pods are refrigerated North Pacific copepods (500-800 microns) harvested and frozen at sea for maximum nutrition. Rich in carotenoids, protein, and omega-3 and omega-6 fatty acids, they are gamma-irradiated for biosecurity and irresistible to fish and corals; stored refrigerated at 33-42F.
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Water PurificationBulk Reef Supply
BRS Paracoccus Powder is a natural source of astaxanthin and carotenoids derived from Paracoccus carotinifaciens, used to enhance red, orange and warm color tones in marine fish and invertebrates such as clownfish, wrasses and shrimp. It is mixed with frozen, freeze-dried or prepared foods during rehydration as a food soak or nutritional additive.
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OtherBulk Reef Supply
BRS Paracoccus Powder is a concentrated astaxanthin and carotenoid powder derived from Paracoccus carotinifaciens, used as a food soak to enhance red and orange coloration in marine fish and invertebrates.
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