Seachem Vibrant Sea™ Marine Salt Blend
Seachem Vibrant Sea™ is a concentrated blend of salts designed specifically for marine and reef aquariums. The formulation contains:
– accurate seawater concentrations of magnesium, calcium and strontium
– enhanced potassium levels
– proper alkalinity
– pH for closed reef aquarium systems.
Vibrant Sea™ is an anhydrous salt that can produce more saltwater from less salt and allows unparalleled uniformity between batches.
As a highly soluble formulation, you can mix and use Vibrant Sea™ in the same day.
| Parameter | Value |
|---|---|
| Specific Gravity | 1.023 |
| pH | 8.4–8.5 |
| Alkalinity | 3–4 meq |
| Calcium | 425–445 mg/L |
| Magnesium | 1,250–1,350 mg/L |
| Potassium | 500–550 mg/L |
| Strontium | 8–10 mg/L |
FAQ
What is the specific gravity of Seachem Vibrant Sea™?
The specific gravity of Seachem Vibrant Sea™ is 1.023.
Can Vibrant Sea™ be mixed and used on the same day?
Yes, Vibrant Sea™ is highly soluble and can be mixed and used in the same day.
Does Vibrant Sea™ maintain stable alkalinity and pH in reef tanks?
Yes, Vibrant Sea™ provides proper alkalinity and maintains a pH range of 8.4–8.5, suitable for closed reef aquarium systems.

Yvonne Ferguson –
I’ve been using Vibrant Sea™ for my 60-gallon reef tank for three months. The water parameters have stayed stable, and my corals are thriving. The salt mixes evenly and doesn’t clump. Great consistency between batches.
Carl Grant –
This salt is easier to mix than other brands I’ve tried. The specific gravity is spot on, and my tank’s pH and alkalinity have remained steady. My shrimp and anemones are active and healthy.
Lucas White –
Good product with accurate mineral levels. I mixed it with my existing saltwater and noticed no fluctuations. A bit more expensive, but the performance is worth it for reef tanks.
Caroline McGrath –
Used it in a new tank setup. The calcium and magnesium levels matched the target ranges perfectly. No issues with water stability or coral health after two months.
Richard Mackenzie –
The salt dissolves quickly and gives consistent results. I appreciate the precise alkalinity and pH control. Slightly more expensive, but reliable for long-term reef maintenance.