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
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1,688 matching items · Most used first
OtherHanna Instruments
Hanna Instruments HI755-11 Marine Alkalinity Calibration Check Set with Standards A and B for verifying proper operation of the HI755 checker. Acceptable results are 90-110 ppm at 25°C.
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OtherHanna Instruments
Hanna Instruments HI758-11 Marine Calcium Calibration Check Set; Standard A and B for verifying proper functionality of the HI758 Calcium checker. Acceptable results 380-420 ppm at 25C.
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OtherHanna Instruments
The Hanna HI758-26 set contains pre-measured replacement reagents for the Hanna Marine Calcium Checker HC, providing 25 tests (1 mL bottle of Reagent A plus 25 Reagent B packets); they use the Zincon method to measure calcium in marine water from 200 to 600 ppm, with lot numbers and expiration dates for traceability.
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OtherHanna Instruments
Hanna Instruments HI764-25 Nitrite ULR reagent refill for the HI764 marine-water checker, with enough reagent for 25 tests. The compatible checker measures nitrite from 0 to 200 ppb.
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OtherHanna Instruments
The Hanna Instruments HI772-11 is a calibration check set for validating the Marine Alkalinity (dKH) Checker HC (HI772), which measures 0.0 to 20.0 dKH. The reusable set includes one sealed cuvette representing 0.0 dKH and one tinted cuvette equivalent to a 5.0 ±0.3 dKH sample at 25°C, and comes with a Certificate of Analysis listing the lot number, reference values, and expiration date.
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OtherHanna Instruments
Hanna HI772-26 liquid reagent refill for the Alkalinity Colorimeter HI772 or HI755 Hanna Checker HC Marine Water, as well as the Marine Master HI97105 multiparameter photometer; enough reagent for 25 tests.
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OtherHanna Instruments
Hanna Instruments HI772-26 Alkalinity Checker reagent refill (dKH); enough for 25 tests. Works with both dKH and ppm alkalinity Hanna Checkers; refill includes liquid reagent only.
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OtherHanna Instruments
Hanna HI774-25 phosphate ultra-low-range reagent refills for the easy-to-use handheld Phosphate ULR ppm Colorimeter HI774 Hanna Checker HC Marine Water, as well as the Marine Master HI97105 multiparameter photometer; 25 packets of reagent.
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OtherHanna Instruments
Alkalinity reagent refills for the easy to use, handheld Alkalinity Colorimeter HI775 Hanna Checker HC - Fresh Water. Enough reagent for 25 tests. Item number HI775-25.
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OtherHanna Instruments
Hanna Instruments HI780-25 Marine pH Checker HC reagent refill; enough for 100 tests with the HI780 marine pH Checker.
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OtherHanna Instruments
Hanna HI782-25 reagent refill for the Nitrate High Range Colorimeter HI782 Marine Water, as well as the Marine Master HI97105 multiparameter photometer; enough reagent for 25 tests.
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OtherHanna Instruments
The Hanna HI782-25 reagent set provides enough reagent for 25 high-range nitrate tests with the HI782 Nitrate Checker HC or the Marine Master HI97105 multiparameter photometer. Each pre-measured packet supports fast, accurate nitrate measurements up to 75 ppm in marine water.
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OtherHanna Instruments
Hanna Instruments HI783-25 Marine Magnesium reagent refill (25-pack) for the HI783 Magnesium Checker HC; pre-made with high-purity chemicals. Each unit marked with lot number and expiration date.
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OtherHanna Instruments
Hanna Instruments HI784-25 Marine Ammonia reagent refill for the HI784 Ammonia Checker HC, with enough reagent for 25 tests. The premade reagents use high-purity chemicals and are marked with lot numbers and expiration dates.
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OtherHanna Instruments
The Hanna HI98108 Waterproof pHep+ is a pocket pH tester for saltwater and freshwater aquariums with 0.01 pH resolution and automatic temperature compensation. It features an extractable cloth electrode junction for extended life, two-button operation with automatic calibration, and simultaneous pH and temperature display on a large multi-level LCD.
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OtherHanna Instruments
The Hanna HI98319 Marine Salinity Tester measures electrical conductivity (EC) to determine the salinity of natural and artificial seawater, displaying salinity and temperature within seconds on an easy-to-read LCD with automatic temperature compensation. Cycles between ppt, PSU, and specific gravity (0.0-70.0 ppt, 1.000-1.041 S.G.); pocket-sized with graphite sensors, calibration solutions, storage case, and CR2032 battery included.
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OtherTropic Marin
Tropic Marin High Precision Hydrometer; handmade float for measuring specific gravity (scale 1.021-1.031) with 0.0001 resolution and max deviation 0.001 at 77F. Never needs recalibration, making it an ideal reference device.
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OtherTropic Marin
Tropic Marin's High Precision Hydrometer provides an exact and reliable measurement of specific gravity and never needs to be re-calibrated, making it a perfect reference device for calibrating other salinity equipment. Handmade to float vertically; scale 1.021-1.031 with 0.0001 resolution; maximum deviation 0.001 at 77 F (25 C). Check for blue printing and the 'Specific Gravity' indication.
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OtherHikari
Hikari Bio-Pure Frozen Mega-Marine Algae (3.5 oz) is a balanced frozen diet for algae-eating marine fish like tangs, rabbitfish, and blennies, blending ocean plankton, krill, shrimp, squid, and algae; it is 3-step sterilized, bio-encapsulated with multivitamins, and supports coloration and growth.
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OtherHikari
Hikari Bio-Pure Frozen Mega-Marine Angel (3.5 oz) is a protein and jellyfish-enriched frozen stick food for marine angels of all sizes, 3-step sterilized, bio-encapsulated with multi-vitamins, retaining natural color and nutrition.
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OtherHanna Instruments
Hanna Instruments HIREEF2 Professional Reef Test Kit; includes the HI772 dKH Alkalinity Checker, HI758 Calcium Checker, HI774 ULR Phosphate Checker, and HI98319 Salinity/Temperature pen. Digital colorimeter-style results on large LCD displays; reagents for ~25 tests each included.
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OtherLoc-Line
The Loc-Line Hose Assembly Pliers are a specialty tool for snapping together and separating Loc-Line modular hose segments, making it easy to build or reconfigure articulated plumbing on return lines and closed loops. Available in versions for 1/2" and 3/4" modular hose.
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OtherTropic Marin
The Tropic Marin High Precision Hydrometer with Measuring Cylinder provides an exact and reliable measurement of specific gravity and never needs to be re-calibrated, making it a perfect reference device for calibrating other salinity equipment. Handmade to float vertically; scale 1.021-1.031 with 0.0001 resolution; maximum deviation 0.001 at 77 F (25 C); includes measuring cylinder. Check for blue printing and the 'Specific Gravity' indication.
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OtherHygger
The Hygger Adjustable Eco Air Pump (10W) features a powerful motor that will power multiple air stones, protein skimmers, or sponge filters; suitable for aquariums ranging from 55 to 600 gallons. Airflow is easily adjusted via the control knob and is ideal for aquariums, hydroponics, or small ponds. Adjustable oxygen pump with energy-saving design; double air outlet and noise-reducing motor (<30dB). Air flow 255 GPH (1000L/HR); pressure 0.04Mpa. Crafted from ABS environmentally-friendly material.
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OtherHygger
The Hygger Aquarium Water Changer provides an easy method for quick water changes; equipped with an aquarium gravel vacuum and easy gravel cleaning via ball design, with simple assembly. Available in two sizes: Model DUS-HG013-S (handle + 1 or 2 tubes with duckbill head or gravel tube, up to 32 in) and Model DUS-HG013-L with various configurations combining handle, hard tubes, gravel tube, and duckbill head. Suitable for various aquarium sizes.
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OtherHygger
The Hygger Automatic Feeder is an app-controlled automatic aquarium feeder with a 230ml food vessel that dispenses pellets, flake, or powdered foods on customizable schedules. It includes a 2K HD camera with night vision for viewing, photographing, and recording the aquarium.
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OtherHygger
The Hygger Digital Thermometer is an external, battery-operated thermometer for aquariums and other enclosures, providing precise temperature readings on a transparent touch display. It features high and low temperature alarms and a Celsius-to-Fahrenheit switch.
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OtherHygger
The Hygger Feeding Bowl (model UUS-HG090) is a durable acrylic feeding dish measuring 2.3 x 2.3 x 3.5 inches. It installs quickly, works well for floating fish foods to reduce waste, and can help separate or protect sensitive livestock species during feeding.
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OtherHygger
The Hygger Hand Operated 3-in-1 Water Changer (model B2B-HG956) provides a simple, hassle-free solution for aquarium maintenance with precise manual control. Its extendable tube adjusts from 22.4 to 40.9 inches to suit a large range of aquarium sizes, with simple assembly and a design that reduces fatigue during routine maintenance.
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OtherHygger
The Hygger Hexagon Air Pump (model BUS-HG971) includes everything needed to increase oxygen levels in the aquarium. This compact, lightweight, energy-saving pump operates quietly at 25-35dB, mounts with double-sided suction cups, and delivers 50 GPH at 12kPa pressure for tanks from 0.5 to 15 gallons.
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