Free Shipping!
Start Earning 5% on Future Purchases SEE DETAILS ›

Narrow Your Results:

Categories
Special
Brand
Aquarium Size (gallons)
Care Level
Temperament
Lighting
Color Form
Family
Genus
Origin
Species
Tank Setup
Water Conditions
Sale Items

Seawater

132 products
Nutri-SeaWater
(3917)
Starting at $19.99
* Live seawater with everything your aquarium needs to thrive * No more mixing or mess - easier to use than synthetic salt mixes * Natural seawater shortens cycling and rapidly removes biological wastes No more saltwater mixing or mess! This "live" natural seawater lets you perform instant water…
AccuraSea® Natural Seawater
(3934)
Starting at $24.99
…pure natural seawater - nothing added, no artificial anything. With AccuraSea Natural Seawater, there's no mixing, no waiting, no muss, no fuss. Just the perfect solution with the right balance of elements and the proper pH every time. AccuraSea Natural Seawater is natural seawater, period.AccuraSea…
Red Sea Seawater Refractometer
(3873)
Starting at $59.99
…High accuracy seawater refractometer features Automatic Temperature Compensation for exceptional accuracy measuring the absolute salinity of seawater at a temperature of 25°C/77°F.Main FeaturesDirectly reads the absolute salinity of seawater at 25°C/77°F (no need for seawater or temperature…
Milwaukee Instruments Seawater Digital Refractometer
(3869)
Starting at $110
…measurement of these three seawater specific scales for a much more precise evaluation of saltwater aquariums. All conversion algorithms based upon respected scientific publications using the physical properties of seawater (not sodium chloride).Milwaukee Instruments Seawater Digital Refractometer…
Two Little Fishies AccuraSea®1 Artificial Seawater Mix
(6079)
Starting at $26.99
…big picture has always been about the details. Two Little Fishies AccuraSea®1 Artificial Seawater Mix synthetic seawater mix is no exception. Fast dissolving AccuraSea1 is formulated to simulate natural seawater and packaged in precisely weighed packs for convenience. The advantages of AccuraSea®1's…
Two Little Fishies AccuraSea Seawater Reference Calibration Solution
(4493)
Starting at $11.04
…natural seawater. Two Little Fishies AccuraSea Seawater Reference Calibration Solution is pure natural seawater standardized at 53.0 mS (S 35) to provide an accurate reference for saltwater testing devices.Two Little Fishies AccuraSea Seawater Reference Calibration Solution is pure natural seawater
Nyos Chromys Liquid Plankton Concentrate
(6071)
Starting at $19.99
…plankton concentrate containing high-quality Mysis relicta that can be added directly to the tank with no defrosting needed. It's a perfect nutritional boost for many ornamental seawater fish and LPS corals, and the garlic actually strengthens the immune system of your seawater fish.250ml/8.5oz
Nyos Artemis Liquid Plankton Concentrate
(6070)
Starting at $19.99
…Nyos Artemis is a liquid zoological plankton concentrate that can be added directly to the tank with no defrosting needed. It's a perfect nutritional boost for many ornamental seawater fish and LPS corals, and the garlic actually strengthens the immune system of your seawater fish. 250ml/8.5oz
Nyos Goldpods Liquid Plankton Concentrate
(6072)
Starting at $19.99
…be used directly. Goldpods contain the calanoid copepods Calanus finmachicus (2 mm in size). This provides ideal nutrition for numerous sensitive seawater fish and LPS corals.The secret of Nyos Goldpods is in the top quality raw material. The fresh-caught copepods are processed by a special method…
Drs. Foster & Smith Magnesium Sulfate
(4444)
Starting at $11.99
…10 gal of water raises magnesium 10 ppm. Use alone or in conjunction with our Magnesium Chloride to more closely match the natural ratio of seawater. With proper magnesium levels, you can enjoy the correct balance of calcium and alkalinity in your aquarium water to support continued coral health.…
Drs. Foster & Smith Magnesium Chloride
(4443)
Starting at $11.99
…per 10 gal of water raises magnesium 14 ppm. Use alone or in conjunction with our Magnesium Sulfate to more closely match the natural ratio of seawater. With proper magnesium levels, you can enjoy the correct balance of calcium and alkalinity in your aquarium water to support continued coral health.…
Coralife Marine Salt
(5711)
Starting at $15.99
…soluble phosphate- and nitrate-free marine aquarium salt*Contains all essential major and trace elements for aquarium healthReplicate natural seawater chemistry with scientific-grade marine aquarium salt. Coralife Marine Salt is formulated with ingredients of the highest quality with optimal levels…
Brightwell Aquatics NeoMarine Precision Salt Blend for Reef Aquaria
(3894)
Starting at $29.29
…natural seawater * Provides aquarium inhabitants all major, minor and trace elements Get to the source of successful marine aquariums with quality seawater. NeoMarine Precision Salt Blend for Reef Aquaria is formulated to create marine environments chemically-similar to natural seawater. Extensive…
EcoSystem Reef Solution
(5737)
Starting at $16.99
* Multi-purpose additive for reef or fish-only marine aquariums * Contains multiple minerals and trace elements found in natural seawater * Convenient solution for vibrant and healthy coral and saltwater fishes All-natural aquarium additive encourages polyp extensions on corals. Contains minerals,…
Seachem Reef Kalkwasser
(4486)
Starting at $14.2
…concentration at natural seawater levels * Ideal way to maintain crucial calcium levels in reef aquariums Ultra fine, easy-to-mix, powdered calcium hydroxide for reliable calcium supplementation. Produces a kalkwasser solution that maintains calcium concentrations at natural seawater levels in your…
DFS22