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Reef Salt
Reef Salt
Reef Salt

Waterbox Aquariums

Reef Salt

Sale price$25.49 USDRegular price $29.99 USD

• Designed specifically for mixed reefs and SPS
• Synthetic Reef Salt Mix
• Full of major an minor trace elements
• Ultra-fast and clean mixing
• ICP-OES tested every 2000lbs. produced

5KG box
Includes 1 x 5kg/11lb bag

20KG box
Includes 4 x 5kg/11lb bags

Size
Size: 5KG/11LB
In-Stock, Ready to Ship

Precision-Balanced. Reef-Ready. Proven Pure.

Creating the perfect reef environment begins with the foundation of seawater itself. Waterbox Reef Salt was developed for aquarists who demand consistency, clarity, and confidence in every mix. Formulated from high-purity ingredients, balanced for coral health, and tested with advanced ICP technology, it’s the dependable salt your reef can trust—batch after batch.

The Foundation of a Thriving Reef

Every successful reef system relies on a precise balance of three major components: alkalinity, calcium, and magnesium. These elements form the backbone of coral health and the chemistry that drives your reef’s growth and stability. Waterbox Reef Salt provides these critical components in optimal proportions—Alkalinity 8.0 dKH, Calcium 460 ppm, Magnesium 1400 ppm—a range proven to promote coral growth while maintaining long-term stability across a wide variety of reef systems.

Alkalinity

Supports pH stability and fuels coral calcification—the process that allows corals to build their skeletons and expand their colonies. Without stable alkalinity, your reef’s entire biological rhythm becomes unstable.

Calcium

The cornerstone of coral and invertebrate growth. It’s essential for skeletal formation in corals and is used by snails, clams, and shrimp. Insufficient calcium leads to weak skeletal structures and stunted growth, halting the natural beauty of your reef.

Magnesium

Quietly keeps it all in balance. It prevents calcium and alkalinity from bonding together and becoming unavailable, maintaining their solubility and ensuring they remain biologically accessible.

Trace Elements That Complete the Ocean

While the major elements build the framework, the ocean’s brilliance lies in its trace elements. Iron, manganese, iodine, strontium, and dozens of others play vital roles in coral coloration, metabolic function, and tissue development.Over time, these trace elements are depleted through coral absorption, protein skimming, and filtration. Without regular replenishment, coral colors fade and growth slows.Waterbox Reef Salt is enriched with a full spectrum of essential trace elements, restoring your system with every water change. It’s more than a salt mix—it’s a complete oceanic solution that keeps your reef vibrant, balanced, and alive.

Manufactured Under Strict Laboratory Standards

Consistency is the hallmark of Waterbox Reef Salt. Each batch is manufactured in small 2,000-pound lots under tightly controlled conditions to ensure purity and repeatability. By working in smaller quantities, we can verify every stage of production with rigorous quality checks.

Every batch is ICP-tested to confirm exact levels of major, minor, and trace elements. This advanced testing process detects even minute impurities and verifies that each box you open matches the parameters printed on the label.The result: no surprises, no inconsistencies—just reef-safe, laboratory-verified seawater every time.

Fast-Mixing. Crystal-Clear. Stable.

Time is valuable—and so is clarity. Waterbox Reef Salt is engineered to dissolve completely and clear within just 15 minutes at 74–76°F. No residue, no cloudiness—just pristine water ready for use.

For reef keepers who like to prepare ahead, Waterbox Reef Salt offers unmatched stability. Once mixed, it maintains excellent clarity and chemistry for up to five days without aeration. Whether you’re preparing a small batch for your nano tank or hundreds of gallons for a large reef, you can trust consistent results every time.

Packaged for Freshness and Quality

Every 20 kg box of Waterbox Reef Salt is divided into four individually sealed black bags. This multi-bag system prevents moisture contamination and protects against light exposure, ensuring the salt remains fresh between uses.Each bag is easy to open, measure, and reseal—perfect for hobbyists who prefer smaller, consistent mixing sessions. For best results, store opened bags in a cool, dry place.

Dosing Calculator

Find how much salt is needed to reach the specific salinity in your aquarium type.

Learn More

FAQs

How much salt do you mix per gallon of water? 

Start with approximately ½ cup salt to 1 gallon of water. Once mixed with the base amount you can adjust the salinity to your desired level by adding more salt or water.

What temperature should the water be for mixing? 

Always use RO/DI freshwater as you never want to use tap water in your saltwater aquarium. The ideal water temperature for mixing is between 74- and 76-degrees Fahrenheit. You can raise the water temperature after mixing is completed to match your aquarium temperature to avoid fluctuations.

How long does it need to mix before use? 

Stir or use a small circulation pump to mix the salt for 15 minutes or until water is clear. 

How long can mixed saltwater be stored? Does it need circulation during storage? 

You can store the mixed saltwater for up to 5 days in a closed container. Due to chance of evaporation test salinity before use. You do not need to circulate the mixed salt during storage but is beneficial to mix briefly before use.

What is the best way to store salt in between uses? 

Waterbox Salt is packaged in black bags to protect against light exposure. Opened bags should be securely closed in between uses and stored in a cool place.

When switching to Waterbox Salt should I make the switch slowly? 

Any changes to an aquarium should be made over time to reduce the risk of causing fluctuations to your water parameters which can stress livestock. Our recommended method for switching salt is to do a weekly 10% water change with Waterbox Salt for the first 4-6 weeks and then resume your regular water change percentage and schedule.

How can I find the batch number for my salt?

You can find the batch number under the lid of the box.

My test kits sometimes show different parameters, why?

Test kits available to hobbyists are not able to measure changes with 100% accuracy and can sometimes be used incorrectly. Any variation is typically less than 3% and will have no impact on the aquarium inhabitants.