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Instant Ocean

Instant Ocean Reef Crystals Reef Salt For 160 Gallons, Enriched Formulation For Aquariums

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Availability: In Stock.
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Arrives Monday, Dec 22
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Size: 160-Gallon


Pattern Name: Aquarium Pond Water Treatment


Features

  • FORMULATED SPECIFICALLY FOR REEF AQUARIUMS: Contains essential ocean reef elements in concentrations greater than those found in natural sea water
  • EXTRA CALCIUM: Encourages stony coral and coralline algae growth.
  • EXTRA TRACE ELEMENTS: Provides vital nutrients.
  • EXTRA VITAMINS: Helps promote growth and survival of corals, anemones and other invertebrates in a captive environment.
  • DETOXIFIES METALS: Neutralizes traces of heavy metals found in tap water.

Description

Instant ocean reef crystals are easy-to-use and provide all of the necessary elements required for a healthy coral environment. extra calcium, trace elements and vitamins promote growth and support the health of a variety of corals; including stony corals, coralline algae, anemones and other invertebrates. built-in metal detoxifier goes a step farther to neutralize traces of heavy metals often found in domestic water supplies.Recommended Specific Gravity Range: 1.020-1.026 at 77°F.

Brand: Instant Ocean


Liquid Volume: 160 Gallons


Item Weight: 47 Pounds


Item Form: Granules


Manufacturer: Instant Ocean


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 12.5 x 12.5 x 15 inches; 47 Pounds


Manufacturer recommended age ‏ : ‎ 1 month and up


Item model number ‏ : ‎ AQ-RC1160P-10


Department ‏ : ‎ Reef Care


Batteries ‏ : ‎ Product Specific batteries required.


Date First Available ‏ : ‎ October 15, 2006


Manufacturer ‏ : ‎ Instant Ocean


Best Sellers Rank: #6,508 in Pet Supplies (See Top 100 in Pet Supplies) #25 in Aquarium Water Treatments


Item Weight: 47 pounds


Department: Reef Care


Manufacturer: Instant Ocean


Item model number: AQ-RC1160P-10


Batteries: Product Specific batteries required.


Date First Available: October 15, 2006


Item Package Dimensions L x W x H: 14.81 x 12 x 12 inches


Item Dimensions LxWxH: 12.5 x 12.5 x 15 inches


Item Weight: 47 Pounds


Brand Name: Instant Ocean


Target Audience Keyword: fish


Directions: See instructions


Country of Origin: United States


Warranty Description: See Label.


Model Name: Reef Crystals Reef Salt For Coral Reef Aquariums


Color: Multicolored


Size: 160-Gallon


Material: cotton


Age Range Description: All Life Stages


Number of Items: 1


Style: Unflavored


Included Components: See label


Specific Uses for Product: Active


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Dec 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • great time tested brand. mixes well
Size: 160-Gallon Pattern Name: Aquarium Pond Water Treatment
time tested salt that the pros use. Well priced and no need to get fancy higher priced salts. You’re going to end up dosing calcium and alk anyway if you keep stony corals.
Reviewed in the United States on November 20, 2025 by Christopher DeBari
    • Consistent!
Size: 200-Gallon Pattern Name: Aquarium Pond Water Treatment
I’ve used Instant Ocean Reef Crystals for a long time, and it continues to deliver great results. The mix dissolves quickly, produces clear water, and holds stable parameters — calcium, alkalinity, and magnesium are always right where they should be. I mix mine in a 32-gallon Brute can with a heater and small pump, and it’s usually ready to use in under an hour. No residue on the heater or pump and no cloudy water. Corals have good color and polyp extension, and I’ve had excellent growth over time. Pro tip: always pour the salt into the water (not the other way around) and use a powerhead for even mixing — it keeps it from clumping and helps the parameters stay consistent. I’ve tried a few other brands, but Reef Crystals gives the best balance of quality and cost. Perfect for routine water changes and dependable results. ... show more
Reviewed in the United States on October 6, 2025 by Seth
    • Excellent product. Worth the price!
Size: 160-Gallon Pattern Name: Aquarium Pond Water Treatment
Review Image by Jason Michaels Jason Michaels
This is the best aquarium salt mix on the market (for the price!). It isn't cheap, but this mix does its job a lot better than Marine Crystals. I can't speak for some of the premium brands that cost double what this does, but I can't imagine that they would be worthwhile investments. My reef tank appreciates the quality of the water, and I've had no issues getting the salt to dissolve by hand in just a few seconds. ... show more
Reviewed in the United States on May 27, 2025 by Jason Michaels Jason Michaels
    • Very good quality
Size: 160-Gallon Pattern Name: Aquarium Pond Water Treatment
Very good quality I will buy more in the future
Reviewed in the United States on October 18, 2025 by Toto abukhalaf
    • Great price and reliable
Size: 160-Gallon Pattern Name: Aquarium Pond Water Treatment
The media could not be loaded. I’ve been buying this reef salt for years on Amazon. It’s a great price and my coral have been happy with it for around 5 years now.
Reviewed in the United States on October 26, 2025 by Kara
    • Awesome aquarium salt, mixes fast!
Size: 160-Gallon Pattern Name: Aquarium Pond Water Treatment
have been keeping Reef Aquariums for over 30 years, from the days when reefers salivated at what Julian Sprung would write his next magazine article. Instant Ocean is IMHO not the industry standard, there are certainly better salt mixtures you can buy but at the end of the day it will make very little difference as Instant Ocean is certainly good enough to keep any coral I have come across alive and thriving. I don't know why one guy is saying go to BRS for the salt. BRS is selling this for $63 while Amazon has it for $44 with free shipping if you have Prime. The reason this salt is the most popular is that it gives the greatest bang for the buck and while its one of the cheapest salts its still a very good salt. I am not a fan of some of the latest pharmaceutical grade multi mixture salts that require like five different things to be added in exact proportions to make a perfect batch of salt. It's too complicated and just an accident waiting to happen. I am a Fan of Red Sea Salt but at almost double the price per gallon of water and not seeing any difference in coral growth I went back slowly to instant Ocean. My tip to you is that when you make a mix of lets say 50 gallons of water you make sure to let it mix via the pumps for at least 24 hours and aerate it properly. Do not add salt all the way to 1.026ppm as the salinity will increase as the mix goes through the 24 hour cycle. I usually stop at 1.020ppm and then check it again in 12 hours and add more salt if needed. When that's done test the water for ALK, Calk and of course the temperature. Heat or Cool the batch to the temp of your tank and then test the Alk, Calk and Mg. If any of them are down from your aquariums parameters then add the needed components in small amounts until you get it as close to your tank water as possible. Typically with Instant Ocean I rarely have to add anything but sometimes ... show more
Reviewed in the United States on December 27, 2023 by tomer 66
    • It's the industries most popular salt for a reason.
Size: 160-Gallon Pattern Name: Aquarium Pond Water Treatment
I have been keeping Reef Aquariums for over 30 years, from the days when reefers salivated at what Julian Sprung would write his next magazine article. Instant Ocean is IMHO not the industry standard, there are certainly better salt mixtures you can buy but at the end of the day it will make very little difference as Instant Ocean is certainly good enough to keep any coral I have come across alive and thriving. I don't know why one guy is saying go to BRS for the salt. BRS is selling this for $63 while Amazon has it for $44 with free shipping if you have Prime. The reason this salt is the most popular is that it gives the greatest bang for the buck and while its one of the cheapest salts its still a very good salt. I am not a fan of some of the latest pharmaceutical grade multi mixture salts that require like five different things to be added in exact proportions to make a perfect batch of salt. It's too complicated and just an accident waiting to happen. I am a Fan of Red Sea Salt but at almost double the price per gallon of water and not seeing any difference in coral growth I went back slowly to instant Ocean. My tip to you is that when you make a mix of lets say 50 gallons of water you make sure to let it mix via the pumps for at least 24 hours and aerate it properly. Do not add salt all the way to 1.026ppm as the salinity will increase as the mix goes through the 24 hour cycle. I usually stop at 1.020ppm and then check it again in 12 hours and add more salt if needed. When that's done test the water for ALK, Calk and of course the temperature. Heat or Cool the batch to the temp of your tank and then test the Alk, Calk and Mg. If any of them are down from your aquariums parameters then add the needed components in small amounts until you get it as close to your tank water as possible. Typically with Instant Ocean I rarely have to add anything but sometimes it will be a bit low on the calcium side. Nothing earth shattering but just enough that I would feel better correcting it. ... show more
Reviewed in the United States on September 5, 2019 by Robbyg
    • Best salt I've used and will never change.
Size: 160-Gallon Pattern Name: Aquarium Pond Water Treatment
Love this stuff! It is the only reef salt I use. I have a 125 gallon tank and it has been used for every single water change. Last a long while. I do less frequent water changes due to not having a huge bio load and a larger than necessary filtering capacity, and I supplement with other additives for the corals. Ive never had cloudy water from this, as long as you pre mix it for a couple of hours. I mix it in a 5 gallon bucket for 6-8 hours and then add it in. ... show more
Reviewed in the United States on June 16, 2025 by Noah Runyard

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