Brightwell Vitamarin-C Vitamin C Supplement 8 oz. 250 ml
Contains calcium, strontium, and magnesium in the same ionic ratios found in aragonite. This unique feature increases the usefulness of KALK+2 to reef-building invertebrates such as corals and clams.
Provides temporary alkalinity and helps maintain pH within the desired range when used as directed. Adds no conservative elements, such as chloride, to the aquarium.
Improves upon the industry-standard powdered calcium supplement over the past three decades. Formulated by a marine scientist.
| Specification | Value |
|---|---|
| Volume | 8 oz (250 ml) |
| Key Components | Calcium, Strontium, Magnesium |
| Alkalinity Support | Temporary alkalinity adjustment |
| Chloride Content | None |
| Formulation Basis | Marine scientist-developed, aragonite-ionic ratios |
FAQ
What is the main benefit of using Brightwell Vitamarin-C in a reef aquarium?
It provides temporary alkalinity and helps maintain pH stability, while delivering calcium, strontium, and magnesium in the same ionic ratios as aragonite, supporting coral and clam health.
Does this supplement contain any chloride or other conservative elements?
No, it adds no conservative elements such as chloride to the aquarium.
How does it compare to traditional calcium supplements?
It improves upon industry-standard powdered calcium supplements by matching the natural ionic ratios found in aragonite, which enhances its effectiveness for reef-building invertebrates.

Irene Gibson –
I’ve used this supplement for several months in my reef tank. The pH stays stable, and my corals have shown better growth. No chloride buildup, which is a big plus. Easy to mix and consistent results.
Nathan Powell –
The calcium and magnesium levels are well balanced. My clams seem more active since I started using this. It’s a noticeable improvement over the old powder I used before.
Andrea Clarkson –
Great product for maintaining alkalinity without introducing harmful elements. The formulation feels more natural and effective. My tank’s pH has been steady over the past two months.