Waterbox Aquariums


Sale price$67.99 Regular price$79.99
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SKU: 400560
• 20kg/44lb 160 gallon box
• 4 x 5kg/11lb bags
• 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
In-Stock. Ships in 3-5 business days.

Waterbox Aquariums Reef Salt

Developed for Reef Aquariums

Formulated for the most discerning Reef Aquarium hobbyists, our REEF SALT is one of the fastest mixing, cleanest and most consistent salts in the industry. Each box contains optimal levels of minor and major trace elements to ensure beautiful coloration and growth of your corals.

Ultra Premium Grade Reef Salt

Formulated For The Waterbox Method

We formulated our REEF SALT with optimal coral growth and coloration in mind. Our proprietary blend of major and minor trace elements combined with ideal Calcium, Alkalinity, and Magnesium levels make our salts ideal for water changes using the Waterbox Method of Reef Keeping.

*Water parameters will change depending on salinity levels.

Benefits of Advanced Formula Synthetic Sea Salts

Waterbox Aquariums® salts are manufactured under strict laboratory supervision to meet the highest quality standards. Our synthetic salts are made from carefully selected raw materials and components. With a synthetic sea salt, we can develop and maintain very strict protocols regarding quality and unwanted compounds and organics. All batches of SEA and REEF salt are manufactured in small batches and ICP tested for exact parameters.

How It's Made

Waterbox Aquariums® salt mixes are manufactured under extremely strict and rigorous laboratory supervision to meet the highest quality standards. All REEF and SEA salts are manufactured in small 2000lb batches(roughly 1 pallet of salt) and are ICP tested at frequent intervals to ensure quality and consistency. This way each box of salt provides you with the same results.

Waterbox 20kg Boxes are packaged in 4 individual black bags to ensure freshness as well as to protect against light exposure. Opened bags should be securely closed in between uses and stored in a cool and dry location.  

Why Switch to Waterbox Salt?

Say goodbye to complex mixing instructions, dirty mixing tanks and inconsistent batches.

Batch Tested with ICP-OES by laboratory technicians

We ICP-OES test every 40 boxes of salt, that is EVERY pallet!

Designed by our team with over 40 years of combined experience

Rich and Jess invested over a year of R&D, testing and aquarium setups with this recipe.

Less environmental impact than competing brands

As a company, we are trying to reduce impact. Which is why we don’t use plastic buckets that are destroying our oceans.

Dosing Calculator

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

Learn More
Mixes up quick and clean no brown residue. I have salt mis in less than 20min. Great product! Super happy!

Stephen K.

Real Reviews

Trusted by Professionals and Long Time Hobbyist.

I decided to give Waterbox reef salt a go. Long story short is I am sold and will continue to use this salt. The price is right but most importantly my fish and corals are showing increases growth. I have also noticed a big change in water clarity and quality. Less mixing station cleaning and pump maintenance are also a bonus. I highly recommend this salt mix.

Bryan F.

Eco-Friendly Packaging

Waterbox Aquariums® is committed to reducing our environmental impact anywhere possible. We chose to be one of the few salt mix brands using no plastic buckets in our packaging. Our Eco-Friendly boxes are recyclable and can easily be opened and closed with our hinged design.

Frequently Asked Questions

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.

  S.G. Salinity Approximate Salt Mix
(Per 5 Gallons)
Fish Only 1.0226 30PPT 658g (23.2oz)

Soft Coral

1.0249 33PPT 720g (25.4oz)
Mixed Reef 1.0256 34PPT 744g (26.2oz)
SPS 1.0264 35PPT 768g (27oz)

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.

Reef Salt Waterbox

Salinity Alk (dKH) Ca (mg/I) Mg (mg/I) K (mg/I)
30 ppt 6.4 - 7.3 350 - 380 1140 - 1220 310 - 340
33 ppt 7.3 - 7.6 380 - 410 1230 - 1310 350 - 380
35 ppt 7.6 - 8.4 420 - 460 1320 - 1400 380 - 400

Sea Salt Waterbox

Salinity Alk (dKH) Ca (mg/I) Mg (mg/I) K (mg/I)
30 ppt 6.7 - 7.6 300 - 330 1070 - 1150 310 - 330
33 ppt 7.6 - 7.8 330 - 360 1150 - 1230 340 - 370
35 ppt 7.8 - 8.7 360 - 390 1230 - 1310 370 - 390

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

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.

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.

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.

Waterbox Sea salt is designed as a more economical option for fish only systems or reef aquariums with only soft corals due to the lower Calcium and Magnesium levels. 

Waterbox Reef salt is designed for mixed reefs, SPS and invertebrates – providing higher Calcium and Magnesium levels which are key building blocks of LPS, SPS and invertebrates. 

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

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.