Search  for anything...

Instant Ocean Sea Salt (50 gal)_MB

  • Based on 8,069 reviews
Condition: New
Checking for product changes

Buy Now, Pay Later


As low as $5 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Thursday, Jan 30
Order within 3 hours and 4 minutes
Available payment plans shown during checkout

Size: 50 Gallon


Features

  • FORMULATED SPECIFICALLY FOR MARINE AQUARIUMS: Contains every major, minor and trace element delicate marine fish and invertebrates need.
  • DISSOLVES FAST: Superior solubility provides a clear, ready-to-use solution in minutes.
  • IDEAL pH: Quickly achieves and maintains ideal pH free of nitrate and phosphate.
  • CONVENIENT: No special additives are needed will not separate during packaging and shipping.
  • INSTANT OCEAN SEA SALT: The industry standard for quality, consistency and value for more than 40 years.
  • Instant Ocean

Description

No matter what size your aquarium, Instant Ocean sea salts and water care products offer the smartest, easiest way to bring to ocean home. Our scientifically formulated sea salts are used exclusively by many of leading large-scale aquariums and research facilities across the country. Instant Ocean Sea Salt is the most carefully formulated and universally preferred sea salt in the world. The 1 choice of hobbyists, public aquariums, and scientific research facilities, Instant Ocean Sea Salt has set the industry standard for quality, consistency, and value for more than 50 years. Mix Instant Ocean with ordinary dechlorinated tap or purified water. NOTE: To prepare small quantities, use 1/2 cup of Instant Ocean per each U.S. gallon of water. Mix as directed. Stir vigorously to ensure a good mix. Although the Instant Ocean solution may be used immediately, we suggest aerating the water until it achieves oxygen/carbon dioxide equilibrium. Measure specific gravity with an Instant Ocean Hydrometer. Adjust salt level accordingly. If specific gravity is too low, add more Instant Ocean. lf too high, add more dechlorinated water. Change 20% of aquarium water every two weeks to maintain optimum water quality. NEVER mix salt in an aquarium containing animals.

Specs & Other Info

SpecificationDetails
BrandInstant Ocean
Liquid VolumeUp to 50 Gallons
Weight6.8 Kilograms (14.96 pounds)
FormStick
Applicable ForMarine Fish Species
Continuation StatusCurrently Produced
Product Dimensions11.81 x 1.97 x 14.57 inches
Recommended Age1 month and older
Model NumberSS3-50
Designed ForUnisex-Adult
Market Release DateOctober 2, 2001
OriginChina
Package Dimensions16.85 x 11 x 2.83 inches
ColorWhite
Volume Size50 Gallon Package
Material Compositioncotton (Packaging Material)
Suitable Age GroupAll Ages
Components IncludedInstant Ocean Sea Salt
Primary UseAquarium Salt for Marine Environments

Frequently asked questions

To mix Instant Ocean Sea Salt for your aquarium, first ensure you have the right amount of dechlorinated or reverse osmosis water for the volume you want to prepare. For a 50-gallon batch, measure the appropriate amount of salt using the guidelines on the packaging (usually around ½ cup per gallon of water, but this can vary). Slowly add the salt to the water while stirring to help it dissolve. Allow the solution to mix with a pump or powerhead until the salt is fully dissolved, which can take up to 24 hours. Make sure to check the salinity with a hydrometer or refractometer, adjusting as necessary to achieve the specific gravity recommended for your type of aquarium.

The ideal salinity level for an aquarium using Instant Ocean Sea Salt depends on the inhabitants of your tank. For most marine and reef aquariums, a specific gravity of 1.020 to 1.026 is ideal, which corresponds to a salinity of approximately 28 to 35 ppt (parts per thousand). It's important to check the specific needs of your aquarium's inhabitants, as some species may require higher or lower salinity levels.

Instant Ocean Sea Salt is specifically formulated for marine and reef aquariums and is not suitable for freshwater aquarium setups. Adding it to a freshwater aquarium would increase the salinity levels significantly, making the environment uninhabitable for freshwater species. For freshwater aquariums, it’s best to use conditioners and treatments that are specifically designed for freshwater habitats.

The frequency of water changes with Instant Ocean Sea Salt in your marine aquarium can vary based on several factors including tank size, number of inhabitants, and type of filtration system. As a general guideline, it’s recommended to perform 10-20% water changes every 2 to 4 weeks. Regular testing of water parameters can help determine the necessity of water changes more accurately. Always match the temperature and salinity of the new water to your aquarium's conditions to avoid stressing your aquatic life.

Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.


The collection of reviews for the Instant Ocean Sea Salt pinpoints it as a high-quality, cost-effective choice for both amateur and professional aquarium enthusiasts. Users highlighted its ease of use, effectiveness for breeding and growing brine shrimp, and superior hatching results compared to other brands. Despite a recent price increase, the consensus is that it remains a worthwhile investment for maintaining marine life.

Pros

  • 🐠 Arrives quickly and meets product descriptions
  • 📦 Well-packaged to avoid damage
  • 🧪 Easy to mix with accurate ratios for various needs
  • 💰 Cost-effective compared to in-store purchases
  • 🌊 Superior for hatching and growing brine shrimp
  • 🔬 Trusted by professionals for decades for breeding and maintaining marine life

Cons

  • 💧 Clumps and hardens easily if not kept dry
  • 💲 Prices have doubled in recent years

Should I Buy It?

If you're an aquarium hobbyist or professional looking for a reliable, cost-effective marine salt that promotes healthy marine life and is easy to use, Instant Ocean Sea Salt is highly recommended. Despite the price increase, its proven track record and user satisfaction make it a sound investment for your aquarium needs.


  • used for my Opau Ula Hawaiian shrimp
The media could not be loaded. works really well, safer than other alternatives. These shrimp need brackish water so measuring is essential AND be sure to full dissolve before adding any livestock. This salt has a fairly quick dissolve rate. Highly recommend.
Reviewed in the United States on December 31, 2024 by Tesla

  • Good stuff
Size: 160 Gallon
This stuff works just as good as the expensive stuff I used to put in my aquarium. If you can find the right place to buy it it’s not quite half the cost as a expensive stuff, but it works just as well thank you.
Reviewed in the United States on November 17, 2024 by terry l brown

  • Wonderful product
Size: 50 Gallon
Great product works as it should
Reviewed in the United States on January 11, 2025 by Ordered the dark blue and received white. Took forever to receive.

  • Good quality salt
Size: 50 Gallon
Easy to use
Reviewed in the United States on November 14, 2024 by Charles

  • Works great
Size: 200 Gallon
It was exactly what I was looking for I want to give it a five star but the package came a broken and taped
Reviewed in the United States on June 25, 2024 by Jessica

  • Good deal.
Size: 50 Gallon
Cheaper than my local shops and arrived in perfect condition, no tears, no clumping. Can't wait to get my brine shrimp started.
Reviewed in the United States on September 12, 2024 by Sophie

  • Intact packaging
Size: 50 Gallon
Used it to hatch my plentiful shrimp eggs. It worked great.
Reviewed in the United States on January 1, 2025 by jesse chen

  • Still Among the Best Synthetic Marine Aquarium Salt after 5 Decades
I used to own a tropical fish shop, a commercial FW fish breeder and now just a retired hobbyist. I only use Instant Ocean salts to hatch and/or grow Brine shrimp now. I have always obtained superior hatches using marine salt mixes over rock salt. In the past, I've cultured some corals but a true measure of a marine salt mix is to have reef fish breed in captivity. I have had pairs of Yellowtail Blue Damsels, Chrysiptera parasema) breed almost every week for months at a time in the early 1980's. In a different setup in the late 1980's and early 1990's I had a 125 gal reef tank. Mostly corals with a few fish. In that tank, my pair of Pygmy Flame Angelfish, Centropyge loricula and trio of Mandarin Dragonets, Synchiropus splendidus, would regularly spawn just after the lights turned off. Of course, I never successfully raised any young because that is too difficult if one is landlocked with no access to tropical plankton to fee the young but some have been successful in tropical Pacific and Caribbean ora.com facilities. Most major public and commercial marine aquariums use Instant Ocean because it has high predictable quality at reasonable prices. ... show more
Reviewed in the United States on January 19, 2022 by Larry W

Can't find a product?

Find it on Amazon first, then paste the link below.