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CaribSea A.R.M. Aragonite Reactor Media 8 lb (Coarse)

CaribSea A.R.M. Aragonite Reactor Media 8 lb (Coarse)


Item #: CS0529

In Stock

Calcium reactors have evolved into several types that require different media sizes. We now offer our original ARM™ fine for downflow, slow upflow, and fluidized bed type calcium reactors and our ARM™ coarse for rapid upflow type reactors. No matter the reactor, CaribSea has you covered.

Manufacturer information

At CaribSea we take aquariums seriously. Since 1972 we have supplied hundreds of public aquariums, zoos, aquaculture facilities, public and private institutions, and hundreds of thousands of dedicated aquarists with the highest quality marine and freshwater products. CaribSea has been in the forefront of the principle that substrates are a piece of equirment, not just a decorative afterthought. Caribsea substrates are as precisely engineered as any piece of advanced equipment used by today`s hobbyists and professionals. CaribSea products are the chemical support, biological filtration, and biodiversity backbone for many of the most spectacular aquatic displays ever created. We are now celebrating our 35th year in the business, and our product line has continued to grow; making CaribSea your aragonite source and so much more.

5 Stars


Reviewed on
September 09, 2020

Yes, I would recommend this.

Melts at 7.6

Pros: None

Cons: None

I don't have any problems melting this media.

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Reviewed on
July 01, 2020

No, I would not recommend this.

Not melting at all

Pros: None

Cons: Does not melt even at 6.2

I never write reviews but feel i have to to save aomeone else aome grief. Checking and rechecking prob pumps reactor all okay. I marked chamber 3 months ago not melting at all. Down to 6.2 but effecting tank ph i than read other people have same problem i am going to tear down again and replace media. Had reactor 15 years ago dont remember media but had no problems.

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Reviewed on
October 29, 2019

Yes, I would recommend this.

Works well

Pros: Works well

Cons: Glass and plastic pieces in it

The only thing you have to consider with this media is it has glass and all sorts of garbage in it plastic pieces but other than that it works well but you do need to spend time cleaning it.

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Reviewed on
March 27, 2019

Yes, I would recommend this.

Works great!

Pros: It really helps my water stay stable

Cons: None

I have been using this for years, ITS GOLD!

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