Discover aquarium tools, test kits, food and accessories and see the tanks using them.
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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
1,688 matching items · Most used first
OtherRed Sea
Red Sea Ammonia Test Kit is a colorimetric test that measures total ammonia (NH3/NH4) in saltwater from 0 to 2 ppm with 0.2 ppm resolution. It provides 100 tests for monitoring toxic ammonia during cycling and routine tank maintenance.
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OtherRed Sea
Reagent refill for the Red Sea Calcium Pro Test Kit, with enough reagent for 75 tests. Red Sea reagent refills make this line of test kits one of the most affordable high quality test kits available.
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OtherRed Sea
Red Sea Calcium Pro is an advanced titration test kit that measures calcium in reef aquariums with 5 ppm accuracy, supporting precise dosing of calcium supplements. The kit performs 75 tests and includes a single-hand precision titrator, analytical-grade glass vials, and a chemical-resistant storage case.
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OtherRed Sea
The Red Sea Iodine Pro (I2) test kit is a highly accurate colorimetric test for total iodine in marine aquariums, with a range of 0-0.09 ppm and 0.01 ppm accuracy across 50 tests; it enables precise dosing of Red Sea's Coral Colors A supplement as part of the Reef Care Program.
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OtherRed Sea
Delux LED Controller.
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OtherRed Sea
The Red Sea Magnesium Pro Test Kit is a high-accuracy titration test for measuring magnesium in reef aquariums, accurate to 20 ppm. It includes a single-handed precision titrator, reagents, analytical-grade glass vials, and a color card in a chemical-resistant case, providing up to 100 tests to support accurate dosing of Red Sea's Reef Foundation C magnesium supplement.
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OtherRed Sea
The Red Sea Marine Care Test Kit bundles the essential saltwater tests for monitoring a new or established tank's biological cycle and ongoing maintenance: ammonia (100 tests), nitrate (100), nitrite (60), pH (100), and alkalinity (55 titration tests), all in analytical-grade glass vials.
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OtherRed Sea
Red Sea combined nitrate/nitrite marine test kit providing 50 advanced colorimetric nitrate tests (0-250 ppm range, 2 ppm accuracy) and 50 nitrite tests (0-1 ppm range, 0.05 ppm accuracy). Essential during the maturation of marine and reef aquariums and for ongoing nutrient/algae management; includes reagents, glass vial, syringe, and color cards.
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OtherRed Sea
A color-comparator test kit from Red Sea that accurately measures nitrate (NO3) in marine aquariums with a range of 0 to 64 ppm and an accuracy of ±0.125 ppm. It includes reagents for 100 tests, with affordable refill reagents available, helping reef aquarists monitor and control nutrient levels to prevent algae outbreaks and promote coral health.
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OtherRed Sea
Reagent refill for the Red Sea Nitrate Pro Test Kit, providing enough reagent for 100 nitrate tests so you can keep using the kit without buying a full replacement.
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OtherRed Sea
Red Sea pH/Alkalinity Test Kit is a dual 2-in-1 kit for marine aquariums combining an accurate titration test for KH and alkalinity (1 dKH accuracy) with a fast colorimetric test for pH. It provides 100 pH tests and 55 KH tests with glass vials, syringes, and color cards.
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OtherRed Sea
Red Sea Phosphate Pro is a colorimetric test kit with an easy-read comparator that measures phosphate (PO4) in reef aquariums with 0.02 ppm accuracy over a 0 to 5 ppm range. The kit performs 100 tests and supports affordable reagent refills.
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OtherRed Sea
The Red Sea Phosphate Pro Reagent Refill Kit replenishes the Red Sea Phosphate Pro Test Kit with enough reagent (Reagent A 50ml and Reagent B 15ml, plus a replacement color wheel) for 100 more high-accuracy colorimetric comparator phosphate tests at 0.02 ppm resolution.
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OtherRed Sea
Red Sea Reef Foundation Pro Multi Test Kit is a high-accuracy titration kit for measuring calcium, alkalinity (KH), and magnesium, the three foundation elements of reef chemistry. It includes a precision titrator and provides 75 tests per parameter for reliable dosing decisions.
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OtherRed Sea
Red Sea's Trace Colors Pro Multi Test Kit combines three high-accuracy tests for iodine, potassium, and iron — elements associated with biological functions including coral pigmentation — in one kit. It includes 50 colorimetric iodine tests (0–0.09 ppm), 40 titration potassium tests (150–450 ppm), and 50 colorimetric iron tests (0–0.5 ppm), plus a titrator, reagents, color cards, and syringe, for precise dosing of Red Sea's Trace Colors A, B, and C supplements.
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Otherhw Wiegandt
hw reduvit pH Reducer from HW Wiegandt reliably lowers the pH value in freshwater and marine aquariums without adversely affecting the sensitive ion balance of the water. As in nature, the pH is lowered by purely mineral means through the release of acids and the use of basic substances, bringing basic minerals into solution for a balanced, stable adjustment; under normal conditions re-dosing is only needed during water changes. Dosing: add a maximum of 4.5 mL per 50 US gallons, wait until thoroughly mixed, check pH, and repeat until the desired level is reached.
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OtherProdibio
Prodibio Reef Booster is a complete nutritional supplement that aids and speeds the development of invertebrates, corals, clams, and microfauna; dosed every 15 days, it supports anaerobic bacteria to reduce nitrate and phosphate and helps stabilize coral colors.
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OtherV2O Aquarium Foods
V2O Aquarium Foods Reef Caviar is a 3.5-ounce frozen food of unprocessed 1 mm Icelandic capelin fish eggs, rich in omega-3 fatty acids for corals, filter-feeding invertebrates, and small reef fish.
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OtherNew Life Spectrum
New Life Spectrum Reef Cell Large Microcapsule Food (400-600 microns) uses microcapsule technology for a stable, nutrient-retaining structure ideal for small reef fish and large filter feeders; it has neutral buoyancy, no added hormones, and 55% minimum protein, available in 15g and 40g sizes.
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OtherNew Life Spectrum
A microencapsulated powdered food from New Life Spectrum with 10-80 micron particles for filter-feeding invertebrates and small-polyp corals; the neutrally buoyant capsules stay suspended in the water column without leaching nutrients, and the formula provides 55% minimum crude protein.
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OtherNyos
A tool or supply for aquarium setup and maintenance. Listed size or rating: 500mL. Brand: Nyos.
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OtherBulk Reef Supply
BRS Reef Chili is a dry powdered coral food blending bio-engineered zooplankton, spray-dried phytoplankton, freeze-dried rotifers and copepods, dried daphnia, spirulina powder and an artemia nauplii replacement diet. It provides complete nutrition for corals and filter feeders to accelerate growth and coloration without needing frozen storage, fed every other day via the included spoon.
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OtherSeachem
A Seachem coral disinfectant dip made of elemental iodine complexed to a protective slime coat that holds the iodine against infected tissue while shielding it from reinfection. It treats bacterial, fungal, and protozoan infections on stony and soft corals, anemones, and polyps, and is used on new corals before introduction to the tank.
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OtherRed Sea
Red Sea Reef Energy B (Aminovit Nutrition) is a highly concentrated complex of vitamins and amino acids that supplies corals with energy for growth and coloration; it is dosed together with Reef Energy A as a two-part nutritional system. Recommended starting doses are 1 mL/25 gal for soft corals, 2 mL/25 gal for LPS and accelerated-growth SPS tanks, and 4 mL/25 gal for enhanced-color low-nutrient SPS tanks; refrigerate after opening.
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OtherReef Factory
The Reef Factory pH Probe is a high-quality replacement probe compatible with the Reef Factory KH keeper Plus and pH meter for accurate pH measurements and reliable performance.
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OtherReef Factory
The Reef Factory Salinity guardian Probe is the replacement lab-grade salinity probe for the Salinity guardian smart monitor. With +/- 0.5 ppt accuracy, it should be replaced annually and calibrated monthly to maintain continuous 24/7 salinity monitoring and alerts.
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OtherReef Factory
Reef Factory Silicone Tubing is replacement peristaltic dosing tubing for Reef Factory dosing pumps and KH Keeper units. It is available in multiple sizes including 1/3 and 2/5 inner diameters.
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OtherAvast Marine
Avast Marine Reef Jerky is a freeze-dried blend of whole-animal marine plankton (Calanus, Mysis, Euphausia, Artemia, Brachionus, Chironomus) with a tri-blend of macroalgae. With particle sizes from 125 microns to 10mm and 57.1% crude protein, it provides complete reef nutrition ideal for small-mouthed planktivores like anthias, wrasses, and cardinalfish; available in 1 oz, 2.2 oz, and 5 oz sizes.
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OtherAPI
The API Reef Master Test Kit tests 4 key parameters – calcium, carbonate hardness, phosphate, and nitrate – to keep reef inhabitants healthy. Testing is fast, easy, and accurate; includes 7 test solutions, 4 test tubes, holding tub, and instructional booklet.
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OtherSan Francisco Bay Brand
San Francisco Bay Brand Reef Plankton is frozen fish and coral food in 30 cubes (3.5 oz), made from all-natural red calanus plankton (Calanus finmarchicus). It feeds saltwater fish, corals, and invertebrates simultaneously, is eagerly eaten by finicky fish like butterflies and anthias, and requires no thawing or rinsing.
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