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Instant Ocean Reef Crystals Reef Salt For 200 Gallons, Enriched Formulation For Aquariums, 25600 Fl Oz (Pack of 1)

4.7 4.7 out of 5 stars 5,693 ratings
$99.99

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200-Gallon
Aquarium Pond Water Treatment
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Purchase options and add-ons

Brand Instant Ocean
Liquid Volume 200 Gallons, 5 Gallons
Item Weight 58 Pounds
Target Species Fish
Allergen Information Cashews Free

About this item

  • Contains essential ocean reef elements in concentrations greater than those found in natural sea water
  • Recommended specific gravity range – 1.020-1.026 at 77ᵒ F | Note – 1.4 lbs. of Reef Crystals is formulated to create 5 gallons of saltwater at a specific gravity of 1.021
  • Our marine salt will typically set the pH of a tank between 8.0 and 8.3 while it produces between 7 and 10 dKH
  • Encourages stony coral and coralline algae growth | Product has a chelator in it that removes the metals from solution
  • Provides vital nutrients | Neutralizes traces of heavy metals found in tap water | It is not generally recommended to use Reef Crystals in freshwater situations

Customer ratings by feature

Easy to use
4.4 4.4
Value for money
4.3 4.3
Flavor
3.9 3.9
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From the manufacturer

Instant Ocean Reef Crystals Reef Salt for Reef Aquariums

Enriched formulation. Optimum effectiveness. Formulated specially for use in reef aquariums, Reef Crystals contains essential ocean reef elements in concentrations greater than those found in natural sea water.

  • Specially formulated for use in reef aquariums – contains essential ocean reef elements in greater concentrations than natural sea water
  • Contains extra calcium to ensure stony coral and coralline algae growth, extra trace elements to provide vital nutrients and extra vitamins to support vigorous growth and survival of corals, anemones and other invertebrates in a captive environment
  • Neutralizes trace heavy metals often found in tap water

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Instant Ocean Reef Crystals Reef Salt For 200 Gallons, Enriched Formulation For Aquariums, 25600 Fl Oz (Pack of 1)

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Product 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.

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 10.5 x 14.75 x 11.5 inches; 58 Pounds
  • Item model number ‏ : ‎ RC1-200
  • Date First Available ‏ : ‎ June 8, 2005
  • Manufacturer ‏ : ‎ Instant Ocean
  • ASIN ‏ : ‎ B0002DJU0G
  • Customer Reviews:
    4.7 4.7 out of 5 stars 5,693 ratings

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Instant Ocean Reef Crystals Reef Salt For 200 Gallons, Enriched Formulation For Aquariums, 25600 Fl Oz (Pack of 1)
Instant Ocean Reef Crystals Reef Salt For 200 Gallons, Enriched Formulation For Aquariums, 25600 Fl Oz (Pack of 1)
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Price$99.99$14.62$139.99-14% $18.49
List: $21.40		$24.40$21.00
Delivery
—
Get it as soon as Saturday, May 11
Get it May 9 - 13
Get it as soon as Sunday, May 12
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Get it as soon as Sunday, May 12
Customer Ratings
4.74.7 out of 5 stars5,693
4.74.7 out of 5 stars3,101
4.74.7 out of 5 stars120
4.84.8 out of 5 stars35,966
4.74.7 out of 5 stars1,442
4.84.8 out of 5 stars7,869
Easy to use
4.4
4.4
3.0
4.7
4.8
4.6
Value for money
4.3
4.0
2.7
4.7
4.6
4.6
Accuracy
—
—
2.3
4.8
4.4
4.5
Sold By
SaltwaterAquarium
Amazon.com
SaltwaterAquarium
Amazon.com
Amazon.com
Amazon.com
target species
Fish
Fish
Fish
Fish
Coral
Fish
liquid volume
5.0 gallons, 200.0 gallons
250 milliliters
200 gallons
500 milliliters
50 gallons
50 gallons
form
—
Liquid
—
Liquid
Stick
Stick
weight
58 pounds
0.6 pounds
0.02 pounds
8.5 ounces
0.01 ounces
6.8 kilograms

Customer reviews

4.7 out of 5 stars
4.7 out of 5
5,693 global ratings

Customers say

Customers like the quality, value, and mixing of the aquarium pond water treatment. For example, they mention it's a great product for reef tank, and mixes easily. Some appreciate shipping, and calcium content. That said, some complain about the damage. Opinions are mixed on dissolves, and stability.

AI-generated from the text of customer reviews

354 customers mention300 positive54 negative

Customers like the quality of the aquarium pond water treatment. For example, they say it's a wonderful product to use if you want to start your own salt water aquarium, and a great product for reef tanks. That said, some say they've never had any problems with it.

"...for the buck and while its one of the cheapest salts its still a very good salt...." Read more

"...Great product! Never expected anything less." Read more

"...This dissolves easily and seems to work well. I do need to use more than the instructions say to get the proper sg. but that is not a problem...." Read more

"...for the buck and while its one of the cheapest salts its still a very good salt...." Read more

226 customers mention218 positive8 negative

Customers appreciate the value of the aquarium pond water treatment. They say it's a solid product at a good price that enables them to maintain their aquarium. Some customers also mention that it'll ship free with Prime.

"...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..." Read more

"...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..." Read more

"...It’s good enough for the price." Read more

"This stuff is pretty cheap and produces just as good of tanks as the more expensive stuff...." Read more

62 customers mention52 positive10 negative

Customers like the mixing of the aquarium pond water treatment. They mention that it blends easily in water with just a little stirring, and mixes quickly. Some say that the product comes in quick and mixes easy.

"Mixes within 24 hours really easy. No settlement or cloudiness and easy measure salt exactly to a 34PPT...." Read more

"...While the Red Sea salt is great quality, and mixes rather quickly, the price point is a little high for most people who are running larger systems...." Read more

"...Never really had the need to switch. It mixes clean for me and the parameters are consistent as far as I test. Great value for my mixed reef." Read more

"...Mixes easily with a small pump even when the water is cooler than tank temperature...." Read more

41 customers mention37 positive4 negative

Customers are satisfied with the shipping of the aquarium pond water treatment. They mention that it was shipped very quickly, arrived quickly in good condition, and was packaged well. Some say that the product could be saved on packaging and just put the label on the bucket.

"...cardboard box with several smaller bags of salt mix inside....shipping is always fast." Read more

"...Most reviews I've read is just from not mixing long enough. It doesn't take long, just 60 seconds of vigorous stirring does the trick...." Read more

"...require additional dosing but for a fish only setup this is great out of the box. Consistent mixing from box to box. Mixes quick and easy...." Read more

"Great salt been using this for years. Could save on the packaging and just put the label on the bucket...." Read more

27 customers mention20 positive7 negative

Customers like the calcium content of the aquarium pond water treatment. They mention that it's rich in calcium and magnesium, and keeps the calcium and alkalinity high. Some say that the higher mineral content is good for corals and provides extra minerals needed for their shells and exoskeletons. Overall, most are satisfied with the product's calcium content.

"...is better for plants in the brackish aquarium and the higher mineral content is good for them...." Read more

"...Has all the nutrients and the right chemical balance that high priced salts do. Would I say this is better than Red Sea?..." Read more

"...I am very happy with jhow well these salts keep the minerals and essential elements up in my tank." Read more

"This salt is great except for the lack of Magnesium! The initial readings are way low, around 1,000 ppm...." Read more

73 customers mention39 positive34 negative

Customers are mixed about the dissolves. Some mention that it dissolves quickly and is great for use in any reef tank. However, others say that it won't fully dissolve until it's been in the fish tank for a while.

"...This dissolves easily and seems to work well. I do need to use more than the instructions say to get the proper sg. but that is not a problem...." Read more

"...Now I remembered one of the reasons I switched brands. It didn't dissolve nearly as easily as my other salt...." Read more

"Disolves well. Fish are happy and healthy. However even with the lid on, it turned into a big solid chunk...." Read more

"...took the container out and opened it, to find that the salt on the inside was solid. I inspected the container to it cracked on the backside...." Read more

34 customers mention21 positive13 negative

Customers are mixed about the stability of the aquarium pond water treatment. Some mention that it keeps their parameters steady, and does a wonderful job keeping levels up. However, others say that the salt is hard and clumpy, and requires a lot of effort to break up.

"...Parameters are always pretty good. And bang for the buck is right on.My box shipped just as pictured...." Read more

"...Two of the bags were as hard as a brick, the third bag had a lot of big chunks and the 4th bag was fine...." Read more

"...It mixes clean for me and the parameters are consistent as far as I test. Great value for my mixed reef." Read more

"Have been using for years. Always mixes easy and is always spot on for salinity and consistency of elements. Great value for the money." Read more

50 customers mention5 positive45 negative

Customers are dissatisfied with the damage of the aquarium pond water treatment. They mention that the plastic bags come in torn, the bucket and the box came broken, and the container cracked on the backside. Some customers also report that the bags have rips in the seams and the product is lumpy and stuck together.

"...started to cause a drop in alk through precipitation and almost crashed my tank (even with weekly 10% WC)...." Read more

"...However even with the lid on, it turned into a big solid chunk. I have to hammer and chip away to get salt loafs to toss into my water buckets...." Read more

"...I inspected the container to it cracked on the backside...." Read more

"Love the sault but the bucket broke in shipping and about 10lbs of the sault was lost!..." Read more

Decent salt for the money
4 Stars
Decent salt for the money
I’ve had a couple issues with this salt over the years…. like the water being crystal clear and 0 tds then I mix the salt and there’s brown slimy floaters on the surface and some kind of fibers? I had a complete tank crash using 4 day old mixed reef crystals saltwater during a Water change, I can’t prove that’s what did it…. But since then I’ve only used it between 24-36 hrs after mixing and I haven’t had any deaths or mishaps. It’s good enough for the price.
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Top reviews from the United States

Robbyg
5.0 out of 5 stars It's the industries most popular salt for a reason.
Reviewed in the United States on September 5, 2019
Size: 160-GallonPattern Name: Aquarium Pond Water TreatmentVerified Purchase
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.
49 people found this helpful
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Gary Dale
5.0 out of 5 stars THE SALT! THE SALT! THE SALT!
Reviewed in the United States on April 3, 2024
Size: 160-GallonPattern Name: Aquarium Pond Water TreatmentVerified Purchase
If you instantly understood my review title, then we can be friends! Great product! Never expected anything less.
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Amazon Customer
5.0 out of 5 stars very good price
Reviewed in the United States on January 31, 2024
Size: 200-GallonPattern Name: Aquarium Pond Water TreatmentVerified Purchase
I like that it is (4) 50 gallon .packs easy to use on a new tank
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Amazon Customer
5.0 out of 5 stars works for my tank
Reviewed in the United States on December 23, 2023
Size: 160-GallonPattern Name: Aquarium Pond Water TreatmentVerified Purchase
I am a long way from a salt water fish store to get water for my reef tank. This dissolves easily and seems to work well. I do need to use more than the instructions say to get the proper sg. but that is not a problem. I will continue using this product
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tomer 66
4.0 out of 5 stars Awesome aquarium salt, mixes fast!
Reviewed in the United States on December 27, 2023
Size: 160-GallonPattern Name: Aquarium Pond Water TreatmentVerified Purchase
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
One person found this helpful
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Gabriel Montero
5.0 out of 5 stars Salty salt
Reviewed in the United States on April 30, 2024
Size: 160-GallonPattern Name: Aquarium Pond Water TreatmentVerified Purchase
This stuff is salt for tank of saltwater fish and coral salty salt with handle
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Jeff Chipley
5.0 out of 5 stars Fast shipping
Reviewed in the United States on April 2, 2024
Size: 160-GallonPattern Name: Aquarium Pond Water TreatmentVerified Purchase
Just as ordered
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Clayton kimball
5.0 out of 5 stars Easiest reef salt
Reviewed in the United States on March 24, 2024
Size: 160-GallonPattern Name: Aquarium Pond Water TreatmentVerified Purchase
The media could not be loaded.
 Mixes within 24 hours really easy. No settlement or cloudiness and easy measure salt exactly to a 34PPT. Calcium and magnesium Are ideal in the salt.
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Clayton kimball
5.0 out of 5 stars Easiest reef salt
Reviewed in the United States on March 24, 2024
Mixes within 24 hours really easy. No settlement or cloudiness and easy measure salt exactly to a 34PPT. Calcium and magnesium Are ideal in the salt.
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Top reviews from other countries

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Enrique Israel
5.0 out of 5 stars Es un problema abrir el producto
Reviewed in Mexico on August 30, 2023
Size: 160-GallonPattern Name: Aquarium Pond Water TreatmentVerified Purchase
Al principio pensé qué venía golpeado, pero resulto qué no, solamente qué estaba sellado al vacío (demasiado), pero el sello de seguridad para retirarlo y abrir la cubeta, fue una asaña por qué de base lo jalo y se rompe, así qué imaginarán la aventura qué fue abrirlo por qué no se cortaba con nada
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GC
5.0 out of 5 stars Great salt for stable parameters and value
Reviewed in Canada on December 19, 2015
Size: 200-GallonPattern Name: Aquarium Pond Water TreatmentVerified Purchase
Great price for $65.00 with free shipping. Have been using Reef Crystals for about eight months now without any problems... creates good stable parameters for a reef aquarium stocked with softies, SPS, and LPS. Previously was using DD H2Ocean - but I recommend Reef Crystals as it is better value and does a better job IMO
One person found this helpful
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Walter Blanco
5.0 out of 5 stars Fácil disolución y queda el agua cristalina
Reviewed in Mexico on April 1, 2021
Size: 160-GallonPattern Name: Aquarium Pond Water TreatmentVerified Purchase
Anteriormente usaba la Reef salt de Seachem para los cambios de agua a mis clientes de mantenimiento, decidí probar con esta marca y me ha dado grandes resultados, los corales se ven mejor, con crecimiento y esponjosos. Otro factor que me ha gustado es que se disuelve rapidísimo y no queda el agua lechosa, por el contrario, queda muy cristalina y lista para agregarse a la pecera. Muy importante para los que hacemos mantenimientos a peceras residenciales. Sé que hay mejores, pero está es una excelente opción.
One person found this helpful
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Amazon Customer
5.0 out of 5 stars Good buy
Reviewed in Canada on January 19, 2020
Size: 10-GallonPattern Name: Aquarium Pond Water TreatmentVerified Purchase
A little on the pricy side, but seems to be quite worth it. I've got a small 1.5L pico reef/"tidal pool"/pest tank on my desk so the 10 Gallon size will last a while. Did a small water change yesterday, and everything seems to be thriving today.
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Martyn Rogers
5.0 out of 5 stars they're reef crystals
Reviewed in Canada on February 8, 2021
Size: 10-GallonPattern Name: Aquarium Pond Water TreatmentVerified Purchase
reef crystals, whadya gonna say? theyre reef crystals. i've been using this brand since the 1980s. i think. i cant remember, hang on a minute.... yeah, yeah. it was the eighties when i first had my shallow 20. we used to think saltwater fish were expensive back then! holy moly! have you seen the price of those new designer clowns!? i wouldnt be putting any of those carpet crunchies in anything shallower than 19 inches. and with a tight fitting lid!... shallow 20.. pfft..most expensive aquarium of my life.

anyways... yeah reef crystals. been using them for, holy moly, decades. good salt for your tank. good for your corals. check your sg regularely .
2 people found this helpful
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