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Brightwell Aquatics Neo-Mag Magnesium Media For Reef Aquaria 1000g / 2.2 lbs

Brightwell Aquatics Neo-Mag Magnesium Media For Reef Aquaria 1000g / 2.2 lbs


Item #: BW01241

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  • High-purity, magnesium-rich mineral that may be employed in traditional calcium reactors, or even blended in to pre-existing aquarium substratum, to gradually increase and maintain the magnesium concentration in the system.
  • Provides magnesium, which helps regulate the balance between calcium and carbonates in aquarium water, and is a component of aragonite, the mineral secreted by reef-building organisms to form skeletal material.
  • Composed of magnesium, calcium, and carbonates.
  • Optimal average particle size for use in media reactors and calcium reactors.
  • Free of chloride and sulfate.
  • Mined in the United States.
  • Solid
  • 1-kg

Reef Chemistry Calculator

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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
July 27, 2019

No, I would not recommend this.

Much easier then dosing!

Pros: Keeps my Mag at a perfect level

Cons: None

I run the in my CalRx and my Mag stays at a constant level in my tank. Makes life so easy!

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Reviewed on
March 27, 2019

Yes, I would recommend this.


I love brightwell aquatics, in general they have good filter media and additives. This one really takes the spot. I would recommend too!

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carl green

Reviewed on
November 08, 2009

Yes, I would recommend this.

Neo Mag

Neo Mag is a great product. Popped it into my calcium reactor and have not had a problem keeping magnesium levels in my 150 gal reef w/over 100 corals for months. My tanks mag levels have not changed from 1250-1280ppm. Rock solid output. At this price there is no reason to consider another magnesium media. I would highly recommend the use of a mag test kit.

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