Caribsea ARM Calcium Reactor Media, 8 lbs. A complete reactor media containing not only calcium and carbonate, but essential trace elements as well.
A complete reactor media containing not only calcium and carbonate, but essential trace elements as well. In fact A.R.M. has nearly 50 times the strontium of other brands (7,390 ppm)
A.R.M. is processed for immediate use, no rinsing required, and has double the surface area of regular aragonite.
Precision grading (2-3mm) allows for maximum carbon dioxide penetration, and the exclusion of gastrpod 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.
A.R.M. has the highest solubility of any reactor media available (metastable at 8.2), so CO2 consumption is much lower.
Container Size: 8 lb.
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Best deal out there. Review by NTSdude
After doing a great deal of research, ARM came always in the top. With the 8 lbs container, I have enough for a second refill. I have a medium size reactor, about a year of use for this size. (Posted on 1/11/2010)