Discover aquarium tools, test kits, food and accessories and see the tanks using them.
Build your setup
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
1,688 matching items · Most used first
OtherIwasaki
The Iwasaki 6500K Single End Metal Halide Bulb (Mogul base) provides high PAR and maximum coral growth with a natural-light 6500K spectrum and balanced red, blue, and green spectral energy; yellow tint can be balanced with actinic supplementation.
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OtherJBJ
The JBJ 5-inch fish net is a high-quality aquarium net for catching and moving fish and invertebrates. Its 5-inch frame size makes it suitable for smaller aquariums and nano tank inhabitants.
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OtherJBJ
The JBJ 8-inch fish net is a high-quality aquarium net for catching and moving fish and invertebrates. Its 8-inch frame size makes it suitable for medium-sized aquariums and larger specimens.
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OtherJBJ
JBJ Fish Net; fine-mesh fish net available in 3-inch, 5-inch, and 8-inch sizes (nets measure 3 x 14, 5 x 17, and 8 x 21 inches including handles). Suitable for both saltwater and freshwater aquariums.
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OtherTwo Little Fishies
Julian Sprung's SeaVeggies Green Seaweed (Porphyra umbilicalis) is nutritious, completely natural seaweed for marine herbivores such as tangs and surgeonfish, Moorish idols, parrotfish, angelfish, and butterflyfish. Offering sheets of dried seaweed (nori) helps mimic the natural foods fish would consume.
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OtherTwo Little Fishies
Julian Sprung's SeaVeggies Purple Seaweed (Porphyra umbilicalis) is a nutritious, completely natural seaweed for marine herbivores such as tangs and surgeonfish, Moorish idols, parrotfish, angelfish, and butterflyfish. Offering sheets of dried seaweed (nori) helps mimic the natural foods fish would consume.
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OtherTwo Little Fishies
Julian Sprung's SeaVeggies Red Seaweed (Palmaria palmata) is a nutritious, completely natural seaweed for marine herbivores such as tangs and surgeonfish, Moorish idols, parrotfish, angelfish, and butterflyfish. Offering sheets of dried seaweed (nori) helps mimic the natural foods fish would consume.
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OtherTwo Little Fishies
Two Little Fishies Julian's Thing is a multi-purpose tool for feeding, applying solutions, siphoning, or blowing. Remove sand from jets with the blow function.
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OtherTwo Little Fishies
Julian's Thing by Two Little Fishies is a multi-purpose aquarium tool designed by Julian Sprung for target feeding corals, anemones, zoanthids, seahorses, and other timid or slow-moving inhabitants. It also applies solutions to pests, siphons out small items, and blows sand from jets, with disposable replacement tips sold separately.
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OtherHikari
Hikari Jumbo CarniSticks (17.6 oz) are floating sticks for larger top-feeding carnivores like arowana and peacock bass, each stick offering the caloric equivalent of one live goldfish, with a balanced color-enhancing nutrient profile.
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OtherD-D The Aquarium Solution
The D-D Jumpguard Feeding Portal is a clip-together accessory that installs anywhere on a mesh screen aquarium lid (including the Jumpguard lid) so fish can be fed without lifting the lid. It has a 50mm diameter opening with a removable lid and a slim universal-fit profile for most screen/mesh covers.
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OtherPaleo-Bond
Paleo-Bond Jurassic Gel 4540 Reef Adhesive; high-strength clear cyanoacrylate gel for structural bonding of live rock and attaching coral frags. Thick enough to bridge small gaps with full cure in several hours; available in 20g and 200g tubes.
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OtherReef Factory
The Reef Factory KH keeper Plus is a compact automated alkalinity testing device with ±0.01 dKH accuracy, testing every 1–12 hours with app notifications and integration with Reef Factory dosing pumps.
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OtherReef Factory
The Reef Factory KH keeper Plus Maintenance Kit maintains peak performance with replacement dosing pump tubes for Pump A (waste), Pump B (water sample), and Pump C (reagent), plus a new water filter for the water sample line.
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OtherReef Factory
The Reef Factory KH Keeper Plus Mixing Pill is a replacement magnetic stir bar for the KH Keeper Plus automated alkalinity tester. Dropped into the testing beaker, it mixes the water sample and reagent during each measurement for accurate readings.
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OtherAPI
The API KH Test Kit is a liquid titration test that measures carbonate hardness (alkalinity) in freshwater and saltwater aquariums. It reads in degrees KH via drop counting, with one drop equaling one degree, so aquarists can track alkalinity for stable water chemistry.
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OtherSalifert
The Salifert kH/Alkalinity Test Kit makes it easy to test the kH/alkalinity level in your tank. Trusted by discerning reefers for easy-to-read results; contains 100-200 tests (typically closer to 100).
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OtherBulk Reef Supply
The BRS Kids Size Crabby T-Shirt is a blue triblend tee made from 50/25/25 poly/combed ring-spun cotton/rayon with a playful crab graphic. It is available in youth sizes X-Small to X-Large.
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OtherSan Francisco Bay Brand
San Francisco Bay Brand Krill (3.5 oz, 30 cubes) is an all-natural frozen fish food of Antarctic krill rich in Omega-3s and astaxanthin, for large saltwater and freshwater carnivores.
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OtherSan Francisco Bay Brand
San Francisco Bay Brand Krill Flat Pack is a frozen fish food of whole Antarctic krill (Euphausia superba). Rich in Omega-3 fatty acids and astaxanthin, it supports coloration, growth, and vigor in large freshwater and marine carnivores such as triggers, groupers, and cichlids.
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OtherRod's Food
Rod's Food Krill + Frozen Food is a 6 oz frozen flat pack of whole krill enriched with astaxanthin, beta-carotene, and omega-3 fatty acids. It provides a nutrient-dense diet for large marine fish and predatory invertebrates, supporting coloration and health.
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Other3F
Krill Pacifica frozen fish food (100 g) is a popular high-protein food for freshwater and marine fish, ideal for larger fish. Krill pacifica is a small shrimp (approx 1 cm) that feeds on other small crustaceans; its natural habitat is the Atlantic and Pacific Ocean.
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Other3F
Krill Pacifica frozen fish food (500 g) is a popular high-protein food for freshwater and marine fish, ideal for larger fish. Krill pacifica is a small shrimp (approx 1 cm) that feeds on other small crustaceans; its natural habitat is the Atlantic and Pacific Ocean.
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OtherBulk Reef Supply
BRS Freeze Dried Krill Superba (Euphausia superba) are whole 1–1.5" krill — two to three times the size of traditional krill — rich in astaxanthin (150–200 ppm), protein (60%), and lipids for color enhancement and growth. Ideal for large-mouthed fish like groupers and snappers as well as smaller fish that shred their food, and helpful for developing feeding responses in new fish; 56 g container.
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Other3F
Krill Superba frozen fish food (100 g) is a large shrimp, up to 6 cm, high in protein and well suited for larger freshwater and marine fish. In nature this shrimp feeds directly on phytoplankton.
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OtherNeptune Systems
A lab-grade conductivity probe from Neptune Systems that measures salinity in a reef aquarium through the Apex controller, enabling real-time monitoring and alerts for salinity shifts. It connects via a standard BNC connector with a 10-foot cable and is also available as a replacement for probes that typically need periodic cleaning, calibration, and replacement every 1 to 2 years.
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OtherNeptune Systems
A Neptune Systems lab-grade dissolved oxygen probe that connects to the Apex PM3 module for continuous dissolved oxygen monitoring. Its sensing membrane is user-replaceable, so the probe lasts long term with routine membrane changes.
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OtherNeptune Systems
Neptune Systems lab-grade double junction ORP probe with a BNC connector, compatible with Apex and other monitors/controllers using a BNC connection. The dual-chamber design isolates the reference gel from proteins and organics that can clog and degrade readings, so it holds calibration longer and lasts longer than traditional single-junction probes.
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OtherNeptune Systems
Neptune Double Junction lab grade pH probes outlast most other traditional lab grade probes, letting you go longer between calibrations and replace probes less frequently. The double junction isolates the reference gel and probe from proteins and other organics that may otherwise precipitate and clog, shortening the probe's lifespan. Compatible with any monitor or controller with a BNC style connection. Includes 1x probe with 10 foot cord; calibration fluid sold separately.
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OtherOceans Wonders
A 15-pack of large flat coral frag disks from Oceans Wonders, made from 100% pure Caribsea reef sand. Measuring 1.5 inches wide and 3/8 inch thick, the weighted disks keep frags of hard and soft corals such as Acropora, Montipora, and Xenia secure against currents, and their calcium-carbonate sand composition encourages coralline algae growth and helps coral tissue spread.
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