Explore plant fertilizers, liquid CO2, reef dosing pumps and supplements used by aquarists.
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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
607 matching items · Most used first
SupplementationKorallen Zucht
Korallen-Zucht Magnesium Complex (500 mL) is a ready-to-use liquid additive formulated to raise or maintain magnesium levels in reef aquariums. Magnesium supports stable calcium and alkalinity levels and prevents excess precipitation; it is suitable for hand-dosing or use with a dosing pump, with a maximum of 3 mL per 50 gallons daily.
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SupplementationTropic Marin
Tropic Marin Cyo-Control (500 mL) is a probiotic bacteria and natural zeolite treatment that naturally blocks the recurrence of cyanobacteria in aquariums. After manual removal of cyanobacteria, the probiotic bacteria settle in their place and outcompete them for recolonization; it contains no antibiotics, biocides, or toxins and can be stored without refrigeration.
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SupplementationSimplicity
The Simplicity 5L Modular Dosing Container has a clear acrylic body with imperial and metric graduations, a snug-fitting lid, strong PVC hose connectors, and integrated float switch holders; multiple units can be connected together, and it resists reef-keeping chemicals including 2- and 3-part solutions.
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SupplementationTropic Marin
Tropic Marin Reef Actif (60g) is a mixture of natural marine biopolymers from algae and plants that activates aquarium microflora: the biopolymers bind excess nutrients and pollutants so specialized marine microorganisms can degrade them, supporting clear water and consistent skimming. Dosing one measuring spoon per 500 liters (132 gallons) weekly supports coral coloration and healthy fish through its prebiotic effect.
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SupplementationESV Aquarium Products
The ESV B-Ionic Calcium Buffer System 64 oz package includes 32 oz of Component No. 1 Alkalinity and 32 oz of Component No. 2 Calcium, dosed in equal parts to maintain calcium and alkalinity levels with no powder mixing.
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SupplementationSimplicity
The Simplicity 6L Triple Dosing Container (3 x 2L) is a three-compartment clear acrylic reservoir designed to organize dosing solutions and keep the sump area tidy. Each compartment has graduated measurements in liters and fluid ounces, a snug-fitting lid, strong PVC hose connectors with 1/4-inch nipple fittings, and integrated float switch holders; it is impervious to 2- or 3-part solutions, RODI water, and supplements.
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SupplementationTropic Marin
Tropic Marin Phos-Start is a particulate nutrient supply for the first 2-3 months of a new reef aquarium's cycling phase, containing natural marine biopolymers, particulate phosphate, calcium, and trace elements like iodide, fluoride, and bromide. It stimulates the microbiome and coralline algae growth, especially in dry rock or bare bottom tanks, with targeted dosing that avoids unwanted nutrient spikes in the water column.
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SupplementationOXO
The OXO Good Grips 7-Piece Liquid Measuring Beaker Set makes small liquid measurements easy with beakers in 1 tsp, 1 tbsp, 1 oz, 2 oz, 1/2 cup, 2/3 cup, and 1 cup sizes. Each beaker has easy-to-read measurement markings, a funnel shape and spout for easy filling and pouring, a slip-reducing rubber bottom, and a nesting design for compact storage.
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SupplementationESV Aquarium Products
The ESV B-Ionic Calcium Buffer System 8 Gallon package includes 4 gallons of Component No. 1 Alkalinity and 4 gallons of Component No. 2 Calcium, dosed in equal parts to maintain calcium and alkalinity with no powder mixing.
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SupplementationTropic Marin
Tropic Marin Pro-Coral A- Trace 2 (1000 mL) is an essential anionic trace element supplement for reef aquariums, replenishing elements like iodine, lithium, manganese, bromine, fluorine, molybdenum, selenium, and vanadium that corals and invertebrates deplete as they grow; supports natural coral color and growth. Dose with Pro-Coral K+ Trace 1 for best results; doser ready, no mixing required. Add 1 mL per 100 L (25 US gal) daily; max 2 mL per 100 L per day.
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SupplementationTropic Marin
Tropic Marin Pro-Coral A- Trace 2 (500 mL) is an essential anionic trace element supplement for reef aquariums, replenishing elements like iodine, lithium, manganese, bromine, fluorine, molybdenum, selenium, and vanadium that corals and invertebrates deplete as they grow; supports natural coral color and growth. Dose with Pro-Coral K+ Trace 1 for best results; doser ready, no mixing required. Add 1 mL per 100 L (25 US gal) daily; max 2 mL per 100 L per day.
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SupplementationTropic Marin
The Tropic Marin ABC Original Balling Components set (3x1 kg) provides the three components of the original Balling method to increase calcium and carbonate concentrations: 1 kg calcium chloride dihydrate, 1 kg sodium bicarbonate, and 1 kg sodium chloride-free sea salt. The components can be adapted and dosed independently; supplying all three maintains ion balance for good growth of corals and red calcareous algae.
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SupplementationPolyplab
PolypLab Acids is a highly concentrated specific amino acid blend that boosts coral growth and coloration in low-nutrient environments, excluding amino acids shown to inhibit growth. Dose 1 drop per 25 gallons of total system water volume daily; includes 50 ml.
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SupplementationKorallen Zucht
Korallen-Zucht AcroGlow is a proprietary solution that enhances coloration and health of Acropora corals, promoting vigorous growth, vitality, and polyp extension with daily dosing. Available in 50mL and 100mL sizes; dose 1 drop per 27 gallons daily and use with or without the ZEOvit system.
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SupplementationKorallen Zucht
Korallen Zucht AcroGlow 50 mL is a proprietary solution that enhances coloration, growth and vitality in Acropora and other SPS corals, notably boosting yellows and polyp extension. Can be used with or without the ZEOvit system; dose 1 drop per 100 L daily.
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SupplementationTwo Little Fishies
Two Little Fishies AcroPower is a trusted amino acid supplement designed for SPS corals that replenishes amino acids stripped by filtration, supporting skeletal growth, polyp health, and vibrant coloration. Dose 5 mL per 25 gallons at least once weekly without refrigeration; available in 250mL, 500mL, 1000mL, and 1-gallon sizes.
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SupplementationADA
The ADA Bell Glass Mini is a glass CO2 addition device designed to efficiently add CO2 into an aquarium, modeled after an upside-down gentian (bellflower). It uses a storage method where CO2 fills the main body and is slowly released into the water, preventing excessive CO2 addition in small aquariums; bubbles from the L-shaped tube act as a counter.
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SupplementationADA
The ADA Cabochon Ruby is a durable and decorative all-glass check valve (no-return valve) for the CO2 supply system, made from a ruby-like mineral that does not deteriorate with long-term use. It prevents aquarium water from flowing backward into the silicon tube toward the regulator when CO2 supply stops; always use it in an upright position.
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SupplementationADA
The ADA Check Valve (Clear) is a one-way flow valve designed for CO2 systems to handle high pressure, preventing backflow from damaging equipment. Made in Japan.
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SupplementationADA
ADA Clean Beads are the disinfectant deodorant refill used inside the container of the ADA Air Sweeper. To maintain the highest performance and effectiveness, replace one 30g bag of Clean Beads monthly.
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SupplementationADA
The ADA Clear Stand is a cylinder stand for the CO2 System 74, corresponding to Tropical Forest series No. 1, 2, 3 cartridges, hooking on the side of the tank to hold the cartridge nicely. Made of high-clarity acrylic; compatible with glass thickness 6mm or under; made in Japan.
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SupplementationADA
ADA Clear Water is an aquarium water conditioner that eliminates phosphate (PO4) and flocculates fine particles causing water cloudiness. Applied to a planted aquarium, water becomes crystal clear with less algae growth.
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SupplementationADA
ADA CO2 Advanced System Forest is ADA's standard CO2 supply kit, an affordable package with the CO2 System 74/Ver.2 and all the essentials. Compact and including Pollen Glass EZ, a glass CO2 diffuser with a built-in bubble counter, and a metal stand for the CO2 cylinder; a perfect CO2 supply kit for beginners with tanks 60cm in width or smaller; made in Japan.
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SupplementationADA
The ADA CO2 Beetle Counter is a CO2 bubble counter for large aquariums with a practical, playful design; bubbles can be easily counted as CO2 rises in a spiral. Designed to be used with Pollen Glass Large or Pollen Glass Beetle; fits 4/6mm soft silicone tubing; handcrafted in Japan.
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SupplementationADA
The ADA CO2 Clear Parts Set includes the parts necessary for connecting and installing glass-made CO2 equipment; suction cups and check valve should be replaced about once a year as they degrade with age. Made in Japan.
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SupplementationADA
The ADA CO2 Forest Bottle (74g) is an aromatic CO2 cartridge infused with ADA's proprietary 'Forest' scent, providing CO2 to the nature aquarium layout while producing a subtle soothing scent. It is the cartridge contained in the CO2 Advanced System - Forest; made in Japan.
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SupplementationADA
The ADA CO2 Glass Counter is designed for measuring CO2 supply with the simple yet accurate bubble counting method, measuring up to 4-5 bubbles per second. Handmade all-glass with a simple design; includes a one-way flow valve and is crucial for minute adjustment of CO2 supply.
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SupplementationADA
The ADA CO2 Mini Counter is a glass CO2 measuring device that allows precise monitoring of CO2 injection by counting visible bubbles. Its compact size makes it ideal for small aquariums up to 18 inches (450mm) wide, for use with an ADA genuine CO2 regulator and mini diffuser.
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SupplementationADA
The ADA CO2 System 74-DA is a fixed, depressurization-based CO2 injection system operating at 0.3 MPa, including a CO2 regulator, a dedicated hook for glass thicknesses of 4-6mm, and a 74g CO2 Forest Bottle. Made in Japan, it can be paired with a compatible ADA EL Valve to regulate and split CO2 injection.
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SupplementationADA
The ADA CO2 System 74-YA/Ver.2 (white) is among the world's safest small CO2 cartridges, designed for planted aquariums. The sterile carbon dioxide disinfects and produces the fragrance of a natural forest, deodorizing aquarium water; includes a CO2 regulator and one 74g CO2 Forest bottle.
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