NATURE'S OCEAN Nutri-SeaWater Natural Live Ocean Aquarium Saltwater, 4.4-gal jug -

Nature's Ocean Nutri-SeaWater Natural Live Ocean Aquarium Saltwater, 4.4-gal jug

By Nature's Ocean
Rated 3.7368 out of 5 stars
$24.99Chewy Price
$23.74Autoship Price
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About This Item


  • No need to wait for water cycling–instantly add fish to your new in-home saltwater aquatic display.
  • Contains 100% natural living ocean seawater–does not remove or modify what Mother Nature intended.
  • Natural live marine heterrotophic, autotrophic and chemolithotrophic bacteria provide proper inorganic balance.
  • Replaces missing natural live marine bacteria, trace elements and critical nutrients needed to maintain ideal tank water quality.
  • Reduces the need for additional saltwater treatment products and helps maintain proper pH by providing improved buffering capacity.

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Play Video: Learn More About Nature's Ocean From Our Team of Experts
Learn More About Nature's Ocean From Our Team of Experts

Questions & Answers

15 Customer Questions

how many boxes of the 4.4 gallon of nutri- seawater would i need to get to fill up a 20 gallon tank
Answer by ChewyDec 05, 2017
For routine water changes: It is recommended to change apportion of your aquarium water 10-20% of volume regularly with Nutri-SeaWater to restore your marine system to Nature’s Ocean. One jug should be enough for one water change for a 20 gallon tank.

What's the specific gravity of this pre-made saltwater? I wouldn't want a big change in salinity while doing the water changes. Thank you
Answer by ChewyDec 15, 2017
The specific gravity of this Saltwater is 1.027.

lt states that this water contains bacteria but how does it live without any food?
Answer by ChewyJan 25, 2018
Natural sea water does contain trace amounts of dissolved organics which sustain the bacteria.

What is the density of the Nutri-SeaWater?
Answer by ChewyJan 24, 2019
The density of the product is 1.027.

ReviewsWrite a Review

Rated 3.7368 out of 5 stars
19 Ratings
Would recommend to a friend

19 Customer Reviews

Rated 4 out of 5 stars
By Good on May 30, 2021

Works great and much easier than mixing your own

I just got my first saltwater aquarium set up a few months ago and used this water to cycle my tank. Even though box says ready to add fish, I still wanted to cycle my tank for a few weeks. I give a 4 star because the water is pricey but much easier than mixing your own water and having to use a heater to match water in your tank etc. Mixing your own water is more of a chore than anything else, and I definitely recommend the pre mix water instead, plus you'll save time this way.

Rated 1 out of 5 stars
By Mandy on May 24, 2021

Not worth it

Crazy overpriced for what is supposed to be actual ocean water. I was surprised when I tested it how low the salinity was, only registering 1.018 on a refractor meter. I suppose it will work if your just topping off your tank. It suggests to do a 15 to 20% water change before adding on the box. That would drop my salinity way to much of I only added this. Definitely not worth the money I was charged.

Rated 1 out of 5 stars
By Jb1224 on May 14, 2021

Usually good but...

This last shipment came in and one container was leaking and the water was green and the other 2 had no seal on them and looked as if the water had been replaced. Glad I figured it out before adding it to my tank but I’m pretty disappointed that I have 15 gallons of trash now and need to go to the store and spend more money to do my weekly water change.

Rated 5 out of 5 stars
By AquaDiva on Jun 3, 2021

Water change

I used this for a reset on my reef after slacking on water changes and it worked great!

Rated 1 out of 5 stars
By MisterJay on Feb 3, 2021


For what you’re getting, this product is outrageously expensive. Get a $6 5-gallon bucket and some instant ocean. Add a splash of dechlorinator. Mix with tap water. Done.

Rated 1 out of 5 stars
By Galina on Jan 14, 2021

Was NOT sealed!!

container was open and liking all over. was not sealed!

Rated 5 out of 5 stars
By Petlover on Apr 6, 2020

Free delivery

Liked the plastic jug the water comes in. Easier to handle than the other brand. Received 2 - 50lb bottle s of water with free shipping in a reasonable period of time. Big bonus!!

Rated 3 out of 5 stars
By Aqua on Apr 24, 2020

It's saltwater

gave a 3 star, simply because of price point. I needed it and didn't wanna make a 2hr drive or appointment to visit the closest aquarium store.

Rated 1 out of 5 stars
By Vicki on Feb 12, 2020

Salt water was fresh water

Opened to bottle to do a water Chang and tested it. It tested with no salinity. It tested in between 1.004 and 1.000. Good thing I checked or it would have crashed my tank.

Rated 5 out of 5 stars
By Saltguy on Nov 12, 2018

Great stuff

Was actually impressed my fish loved it didn't use it to start up my new tank just added it to tank is 4 weeks old and I have no reason to say you couldn't use it to start up