Instant Ocean Aquarium Salt - 50 gal.

SKU: 198140
Manufacturer: Instant Ocean
MPN: 003746

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Instant Ocean synthetic sea salt contains every necessary major, minor, and trace element and has no nitrates and no phosphates. It was developed through sophisticated biological and chemical testing, and every batch is analyzed to assure consistent high quality. Exceptional solubility, uniform particle size, and outstanding package value have made Instant Ocean salt the choice of aquarists for over 30 years. No other product out performs Instant Ocean salt.

Not sure which salt to buy for your aquarium? Check out our aquarium salt guide to quickly compare.


Instant Ocean
Package Size18 lb.
Makes50 gal.
Internal Id


Approx. content analysis, with salt mixed to 35 ppt or a specific gravity of 1.026:

Calcium, 400 ppm
Alkalinity, 11 dKH
Magnesium, 1350 ppm.


Mix Instant Ocean with ordinary dechlorinated tap or purified water. To prepare small quantities, use 1/2 cup of mix per each U.S. gallon of water.

Ratings & Reviews

2 reviews

  • 5 stars
  • 0 reviews
  • 3 stars
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  • 2 stars
  • 0 reviews

Easy to use


I like this product, it is easy to use and dissolves fast.

Good product bad shipping


I recently purchased a bag of this online and it showed up with not one but TWO holes in the bag. So you would think "okay maybe it was dropped during shipping or something". Nope! There was tape all over the bag!