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ARM Reactor Media Extra Coarse

Marsoni M251S
Sale price$59.95
Pay 4 payments of $14.99 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
ARM Reactor Media Extra CoarseOne of the most trusted media for calcium reactors in the industry. The media is a complete solution which includes both calcium and carbonate as well as essential trace elements. The media comes in three forms Small, Coarse and Extra Coarse. Small Provides the most surface area which maximizes the amount of calcium and carbonate which can be added to the tank. *The small size can clog many reactors and may require on going maintenance. Coarse larger
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4.6 ★★★★★
Based on 1690 reviews
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Jeff Pesos
New York, US
★★★★★ 4
Works like a supplement
If you use it and see a difference, you will blame it on this cleaner, if not, you will say the product does not work. Exactly like your weight loss supplements! Who knows what this stuff does, but it may do something. Or maybe it does not.
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Reviewed in the United States on February 7, 2026
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Michael Sliwinski
Battle Creek, US
★★★★★ 5
Used to clean an O2 sensor
Seems to have resolved an issue with a wavering idle for my 89 Mercedes 300e with 468,000 miles.
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Reviewed in the United States on March 27, 2026
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Marvin Burton
Phoenix, US
★★★★★ 3
Nothing
Didn’t work for me
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Reviewed in the United States on May 26, 2026
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mechanic
Port Orchard, US
★★★★★ 1
It doesn’t work
This don’t work at all. I do not recommend. I use all four containers, and the light is still on.
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Reviewed in the United States on May 20, 2026
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Amazon Customer
Pawtucket, US
★★★★★ 5
2014 Ford Edge SEL
Worked like a charm! Used as directed, it cleared the P0420 & P0430 codes that were coming up on my OBD II scanner after a complete engine swap. Definitely recommend this product.
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Reviewed in the United States on May 23, 2026

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