Seachem Aquarium Salt Mixes


  1. Mix salt with dechlorinated tap or purified water. If source water quality is extremely poor, the use of a RO/DI system is recommended.
  2. Stir well to ensure a good mix. Although the salt solution may be used immediately, aerate the water to achieve oxygen/carbon dioxide equilibrium.
  3. Measure specific gravity. Recommended range for marine aquariums is 1.020 - 1.023 at 75°F. For reef aquariums: 1.020 - 1.025 at 75°F.
  4. Adjust salt level accordingly. If specific gravity is too low, add more salt mix; if too high, add more dechlorinated or purified water.
  5. Change 25% of aquarium water every 2-4 weeks (or as necessary) to maintain optimum water quality.

To prepare small quantities, use 1/2 cup per each US gallon of water. NEVER add salt directly into an aquarium containing animals. Always prepare salt mixture in a separate container.

CAUTION: Not for human consumption. Keep out of reach of children. Contact in dry form may cause skin or eye irritation. In case of eye contact, completely flush eye(s) with cool water and seek medical attention immediately.

Composition of Seachem Reef Salt

Ion Concentration (ppm) Ion Concentration (ppm)
Chloride 19336 Sodium 10752
Sulfate 2657 Magnesium 1317
Potassium 421 Calcium 442
142 Strontium 9.5
Boron 16 Bromide 64
Iodide 0.060 Lithium 0.3
Silicon < 0.1 Iron 0.0098
Copper 0.0003 Nickel < 0.015
Zinc 0.0107 Manganese 0.0023
Molybdenum 0.0098 Cobalt 0.0004
Vanadium < 0.015 Selenium < 0.019
Rubidium 0.118 Barium < 0.04

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