Marine Salt Mixes Just Got Better.

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

ICP Tested Every 40 Boxes for Consistency and Quality

Fully Synthetic Laboratory Made

Ultra-Fast and Clean Mixing

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.

Their Salt VS Our Salt

Our salts are one of the cleanest mixing salts in the industry with no brown residue. Can be used in 15 minutes and stored for up to 5 days without circulation.

  • Their Salt

  • Mixes Dirty

  • Complex Mixing

  • Mixes Slow

  • Can't Be Stored

  • Our Salts

  • Mixes Clean

  • Easy Mixing

  • Mixes Fast

  • Can Be Stored

Give Your Aquarium Health and Vitality

  • Clean and consistent salt mix will increase the lifespan of your inhabitants

    Our salt is CLEAN, and it mixes in just minutes. Ready to use in 15.

  • Ideal parameters for corals and fish

    High elevated parameters such as alkalinity is risky for corals.

  • Safeguard your aquarium with ICP-OES testing and unique lot id tracking

    Each batch of salt is assigned a lot #, and tested by lab professionals every 2000lbs which is roughly every single pallet of salt.

Trusted by Professionals and Long Time Hobbyist.

“I was previously using Red Sea Coral Pro salt. The problem I had was the residue and water was never crystal clear. I did like the elevated parameters but in the end I decided to starting using a dosing system to maintain my water parameters. I switched to Tropic Marin salt and loved everything about it except the high price. 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.”
Brian F.
“Love It! Mixes up quick and clean no brown residue. I have salt mix in less than 20 min. Great product! super happy!”
Stephen K.
“Ended up switching salts after some quality issues. This salt mixes quick and easy. I've been able to hold it mixed for multiple days with 0 issues with gunk coating my brute..”
Josef K.
“Mixes clean, parameters are great. So far so good!.”
John G.

Find The Right Salt Mix For You

Our salts are one of the cleanest mixing salts in the industry with no brown residue. Can be used in 15 minutes and stored for up to 5 days without circulation.

  • Sea Salt

  • MSRP $87.49
  • Designed for less demanding aquariums
    with fish only or soft corals.
  • 360

    Calcium Level
  • 8.5

    Alkalinity Level
  • 1300

    Magnesium Level
  • Reef Salt

  • MSRP $99.99
  • Designed for
    mixed reef and sps aquariums.
  • 460

    Calcium Level
  • 8

    Alkalinity Level
  • 1400

    Magnesium Level

Protected by Waterbox Assured Warranty

We are so confident in our salt mixes that we will protect your purchase with not one..not two..but THREE Waterbox Guarantees.

30-Day Unconditional Money Back Guarantee

If your aren’t satisfied with our salt mix for ANY reason..just let us know in 30 days and we’ll glady send a full refund.

90 Day Exchange Guarantee

After the 30 day money back guarantee period has passed, we’ll still allow you to exchange your salt mix towards any product on our site for up to 3 months.

1 Year Replacement Guarantee

If anything is wrong with your salt within 1 year we will offer a free one-time replacement-no matter the cause or condition. 



In stock usually ships in 24-48 hours

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.

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

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.

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.