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Korallin C4002 Calcium Reactor with Eheim Pump - Media Not Included


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Item #: KL4002

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Korallin C-4002—Rated for up to 1600gal. Reactor height: approx. 24.00"; Diameter: 6.30"; Ground: 7.50"; Filling amount: 10 kgs (22lbs); Eheim 1250 Pump.

Manufacturer information

Korallin is a German based company who is a manufacturer of specialized aquatic components and accessories for the advanced marine aquarist.

5 Stars


Reviewed on
September 06, 2017

No, I would not recommend this.

Product Needs Redesign

Pros: large chamber

Cons: air leakage and time consuming to change out media

I have been running this calcium reactor on a large reef for over 6 years. There is a design flaw which allows air to creep into the chamber which plays havoc with the pump causing pump failure. Hard to get pump going again. This reactor requires constant monitoring and adjustment. Not worth the money. Also not easy to change out the media.

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adriano bolzani

Reviewed on
March 08, 2008

Yes, I would recommend this.

Great Product

Installed 2 days ago in replacement for a C1502 because my system requirements. It's putting 40 dKH on 1,5lt / hour with PH 6,65 on efluent. I believe it could do more if I reduced the PH but it's great so far.

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