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Brightwell Aquatics Vitamarin-C - Vitamin-C Supplement for all Marine Aquaria 250mL / 8.5oz


Item #: BW01067

In Stock

Concentrated Vitamin-C Supplement for all Marine Fish & Reef Aquaria

  • Highly-concentrated vitamin-C solution.
  • Buffered; will not impact pH when used as directed.
  • Stronger than competing products.
  • Vitamin-C is associated with improved tissue growth and with aiding the immune system.
  • Intended to provide benefits to all aquarium inhabitants.
  • Well-suited to use in coral propagation.
  • Requires no refrigeration.
  • Composed of purified water and ultra-high purity ingredients.
  • Formulated by a marine scientist.
Technical Background
The benefits of vitamin-C to aquatic organisms are largely related to improved tissue growth, particularly after recently-sustained injury or illness. Corals and their allies, in particular, have been observed to benefit tremendously from regular controlled dosage of vitamin-C by increasing their rate of soft tissue growth; this aspect is of particular interest to hobbyists and researchers involved with coral propagation, in which coral tissue is damaged during the process of splitting colonies and/or individual polyps. Grow-out systems regularly dosed with vitamin-C also tend to have improved growth rates when compared to control systems with identical environmental conditions. These benefits are believed to be a result of the positive impact that vitamin-C has on the immune system; this benefit translates to fishes as well as to the remainder of invertebrates maintained in marine aquaria.

Vitamins are compounds required in minute concentrations for vital metabolic reactions; the amounts of vitamins required for a given species varies. Short-term vitamin deficiencies can typically be tolerated by most organisms, however long-term deficiencies tend to result in abnormalities, poor health, and eventually even death of the specimen. Conversely, if severely overdosed, ingested vitamins can have a negative impact on a specimen by way of toxicity, though the impact is unlikely to be permanent. Decreasing the vitamin dosage typically results in full recovery of the affected specimen. For these reasons, it is recommended that Vitamarin-C be utilized either as a means of delivering vitamins to aquarium inhabitants through food or by direct addition to the water, but not both except as noted on opposite panel when using with organisms that have sustained tissue damage.

Vitamarin-C does not require refrigeration, however storage in a cool, shaded area will prolong the activity of the vitamins. Refrigeration will maximize the shelf-life of the product.

Instructions and Guidelines
If using to fortify food (recommended): Place food in a clean container such as a small bowl or cup and add only enough Vitamarin-C to saturate. Allow at least 5 minutes to elapse before feeding, enabling adequate time for the vitamins to become thoroughly absorbed by the food. Liquid food suspensions may be fortified by adding 1 ml (approximately 8 drops) Vitamarin-C per 10 ml of food suspension; stir to mix and allow 5 minutes to elapse before feeding. Maximum benefit of any liquid food suspension is achieved when the food is target-fed to the intended organisms rather than poured into a stream of water and allowed to disperse randomly throughout the aquarium.

If adding directly to aquarium water: Begin by adding 2 ml (approximately 16 drops) of Vitamarin-C per 20 US-gallons of water weekly for the first four weeks of use; this corresponds to adding approximately 2 drops per 20 US-gallons each day. Then, gradually increase the weekly dosage to 4 ml per 20 US-gallons over the following four weeks and maintain this dosage. [Note: if using Vitamarin-C in conjunction with Brightwell Aquatics Vitamarin-M, decrease dosages by 50%.] Starting at a low dosage will not cause any harm to the livestock, and will enable you to notice subtle changes in the appearance of the system that indicate the effectiveness and need for the product. Note that doubling the dosage of Vitamarin-C is acceptable when fortifying food meant for organisms appearing to be in poor health, including fishes and invertebrates. Maintain the increased dosage only as long as is deemed necessary, and observe water quality carefully at all times, making adjustments as needed. No medicinal claims are made for Vitamarin-C, however vitamin-C has been consistently observed to have a positive impact on immune systems, in general.

Caution: Keep out of reach of children. Not for human consumption.

Guaranteed Analysis
Ascorbic acid (C) (min): 1,500 mg/oz.

Purified water, Ascorbic acid, Buffering agents.

Manufacturer information

Brightwell Aquatics Aquarium Supplies
The goal of Brightwell Aquatics is to provide the absolute highest quality, scientifically-sound products and customer service of any aquarium water care manufacturer, and to do it all in a straight-forward and honorable fashion. All Brightwell products are formulated by marine scientists with a passion for the aquarium hobby. They utilize the highest purity ingredients in concentrations that provide the most use to hobbyists. Nearly all Brightwell Aquatics products are over 99.9% pure. The usage guidelines of Brightwell Aquatics products are written in plain language but the company is always available to answer consumer questions. All products are lot numbered for quality control and customer service.

5 Stars


Reviewed on
September 18, 2019

Yes, I would recommend this.

Great product

I get great results using this to soak frozen food. I do not use ALL of the time, just whenever any fish are new or showing signs of potential stress or sickness. Think of it as airborne for your fish!

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Reviewed on
August 30, 2019

Yes, I would recommend this.

Saved my tank

Pros: Everything. Boost immune system and healing of wounds.

Cons: None

I use this in conjunction with vitamarin m to boost my fish’s immune system sometimes I’ll add Kent garlic to the mix but ultimately I’ve had a few small breakouts of spots on the fish and sores from those spots and just by using the vitamins I named and keeping the water clean my fish have bounced back from sickness. Now I will add that whenever I add new fish sometimes that causes stress which can bring the spots back on in my tank, but that’s only because when one fish is stressed the whole tank can become stressed due to the chemicals a stressed fish releases into the water.

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Reviewed on
May 30, 2018

Yes, I would recommend this.

Great for ZOAS

I read articles of people dosing Vitamin C for their Zoas and thought I'd give it a try. My zoas are doing alot better and the colors are great.

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Reviewed on
June 26, 2017

Yes, I would recommend this.

Fish and coral love it!

I've been dosing Brightwell Aquatics vitamin C daily for years. It's a huge immunity booster for fish and coral benefit greatly from it as well. It also helps zoas grow extra big polyps.

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jeronimo roque

Reviewed on
August 18, 2014

Yes, I would recommend this.

Vita C review

Great product to add to your reef tank both for the livestock as well as corals

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Reviewed on
June 30, 2013

Yes, I would recommend this.

love this stuff

I use this product regularly. Keeps my fish and tank healthy! Have SPS and LPS, clams and other inverts with no adverse affects.

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will tomlinson

Reviewed on
December 05, 2009

Yes, I would recommend this.

Great product

I starting using this on my reef six months ago and ever since then a huge improvement with the health of my fish has skyrocketed! The ones that come sickly through the mail get well quickly with the added immunity burst. I've gotten my fish over ick with this stuff and it works very, very well. Great product.

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dave b

Reviewed on
April 23, 2009

Yes, I would recommend this.

Super Growth!

I have been using Vitamarin-C for a couple months now with great success. I typically use it to reconstitute freeze dried foods such as cyclopeze and reef-roids before feeding my tank. The growth of soft tissue on all of my corals has definitely increased since I started using this product. Newly fragged corals also heal and start growing much quicker with this product.

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Reviewed on
April 20, 2009

Yes, I would recommend this.


I always get great and positive changes when using Brightwell products in my tank.

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