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Red Sea Alkalinity Pro Test Kit - Reagent Refill Kit


Item #: RS21411

In Stock

Red Sea’s KH/Alkalinity Pro Test Kit is an advanced titration test, measuring the level of buffers in your reef aquarium to an exceptionally high accuracy of 0.05 meq/l (0.14 dKH).

Reagent Refill Kit Only - Includes reagents only to perform 75 aquarium water tests with the Red Sea Alkalinity Pro Test Kit.

Manufacturer information

With a dedicated team of scientists and other professionals, Red Sea is widely recognized as a leading innovator and manufacturer of quality products for aquarium hobbyists. Red Sea constantly strives to provide hobbyists of all levels with highly effective solution-driven products designed to make your fish-keeping experience as enjoyable and successful as possible.

The embodiment of Red Sea’s dedication to providing solutions for today’s reef-keepers is its range of MAX-NANO, MAX-E & MAX-S aquariums- The only choice for true Plug & Play™ coral reef aquariums, now featuring the very latest in LED lighting technology.

For advanced reef-keepers the Red Sea REEFER provides a great platform into which you can add your own selection of hardware. With its ultra-clear glass, ATO built-in, silent flow valve and superb quality of finish the REEFER sets the standard for those wishing to customize. REEFER is also available as a Deluxe version with LED lighting included.

Red Sea’s unique Reef Care Program (RCP) provides a comprehensive, safe and easy to use program for testing and supplementing within reef aquaria, and is perfectly complemented by Red Sea’s Coral Pro & Red Sea Salt’s, which has become the salt of choice for those seeking the very highest quality water quality for their coral reef aquariums. Both salts are made using a unique natural process which delivers unrivalled homogeneity and is perfect for delicate corals. Check your individual bucket of salt’s composition using Red Sea’s innovative new “MyBatch” software.

Whatever your aquatic needs, Red Sea delivers high quality innovative, solution based products.

5 Stars


Reviewed on
July 10, 2020

Yes, I would recommend this.

Fast, Simple, Easy

Pros: Fast, Simple, Easy, Inexpensive

Cons: It doesn't completely fix everything in the world.

Great product, especially with the new and improved color differentiation. Only 1 additive needed for testing, unlike any other brand of titration test kit. Simple to use, fast, and easy.

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Reviewed on
January 14, 2020

Yes, I would recommend this.

Great refil kit

Alkalinity reagent refill kit comes with reagent plus a new syringe and instruction/results card.

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Reviewed on
August 14, 2019

Yes, I would recommend this.

Red Sea Alk Refill

Pros: new reagents AND gear

Cons: new reagent test results showed 0.8dkh higher than previous reagent.

It was as expected, came within time frame stated at time of purchase and included new syringe and blue syringe cap.

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