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Brightwell Aquatics Neo Mag Magnesium Media, 2.2 lbs
Brightwell Aquatics Neo Mag Magnesium Media, 2.2 lbs
Our Price: $13.20
In Stock


  • 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
  • Free of chloride and sulfate
  • Mined in the United States
CaribSea ARM Calcium Reactor Media, Course, 8 lb
CaribSea ARM Calcium Reactor Media, Course, 8 lb
Our Price: $26.95
In Stock

CaribSea ARM Calcium Reactor Media, Course, 8 lb, is a complete reactor media containing not only calcium and carbonate, but essential trace elements as well. ARM has nearly 50 times the strontium of other brands (7,390 ppm), is processed for immediate use, does not require rinsing, and has double the surface area of regular aragonite. Precision grading (2-3mm) allows for maximum carbon dioxide penetration, and the exclusion of gastropod shells ensures the lowest phosphate (less than 1/10 of 1 ppm) and silica (about 1/2 that of other brands) content. This grading also carries in the highest concentration of Halimeda incrassata, an aragonite so pure it has been used as a laboratory standard. ARM has the highest solubility of any reactor media available (metastable at 8.2), so CO2 consumption is much lower. ARM is essentially what your corals are made of. 8 lb.
Two Little Fishies ReBorn Calcium Reactor Media, 44 lb
Two Little Fishies ReBorn Calcium Reactor Media, 44 lb
Our Price (price includes free shipping!) $162.00
In Stock

Two Little Fishies ReBorn Calcium Reactor Media is a coarse aragonite media for calcium reactors, composed of fossil skeletons of reef building corals sustainably harvested from pristine sites in the Western Pacific. When dissolved, ReBorn replenishes calcium and carbonate alkalinity, strontium and trace elements. The coarse size of ReBorn allows for unrestricted water flow and easy diffusion of carbon dioxide, for maximum efficiency and easy maintenance of the calcium reactor. ReBorn dissolves completely and will not turn to mush. These features combined with its very low phosphate and silicate content mean that ReBorn is the ideal media to use for promoting the growth of live corals, clams, calcareous algae, and other calcifying creatures in a reef aquarium. 45 lb.
Two Little Fishies ReBorn Calcium Reactor Media, 8.8 lb
Two Little Fishies ReBorn Calcium Reactor Media, 8.8 lb
Our Price: $39.99
In Stock

Two Little Fishies ReBorn Calcium Reactor Media is a coarse aragonite media for calcium reactors, composed of fossil skeletons of reef building corals sustainably harvested from pristine sites in the Western Pacific. When dissolved, ReBorn replenishes calcium and carbonate alkalinity, strontium and trace elements. The coarse size of ReBorn allows for unrestricted water flow and easy diffusion of carbon dioxide, for maximum efficiency and easy maintenance of the calcium reactor. ReBorn dissolves completely and will not turn to mush. These features combined with its very low phosphate and silicate content mean that ReBorn is the ideal media to use for promoting the growth of live corals, clams, calcareous algae, and other calcifying creatures in a reef aquarium. 8.8 lb.