The store will not work correctly in the case when cookies are disabled.
Bulk Reef Supply Saltwater Logo
Bulk Reef Supply Freshwater Logo

FREE Shipping Over $49

Free Shipping

Orders Over $49 Ship Free

$5.99 economy shipping on orders under $49

Learn More
| Earn Reward Points
Skip to Content
Menu BRS Freshwater
My Cart
    • My Account
    • My Wish List
    • My Orders
    • Address Book
    • Sign Out
    • Reward Points
  • Sign In
Bulk Reef Supply Mobile Menu
Close

Quick Links

  • Deals
  • Gift Cards
  • What's New
  • Education
  • Clearance
  • Open Box
  • PR Rewards
  • Shop Brands
  • FAQs
  • Saltwater
Menu
Fast Shipping Fast Shipping
Sign up to be a Reward Member Earn Reward Points
Returns 365-Day Returns
Experts Aquarium Experts
  • Fast Shipping Fast Shipping
  • Sign up to be a Reward Member Earn Reward Points
  • Returns Risk-Free 365 Day Returns
  • Experts Aquarium Experts
Loading...
Hanna Instruments

Alkalinity DKH Colorimeter HI772 Hanna Checker - Marine Water

In stock
Out of stock
SKU
210018
Be the first to review this product
$67.99 $67.99

- +
Add to Wish List
Risk Free 365 Returns

Your Satisfaction Guaranteed With
365 Day Risk Free Returns

No longer need what you ordered? Ordered one too many? We've got your back.


Return new, unopened products in original packaging within 365 days for a full refund.

Under 60 days? No problem. We’ll issue your refund to the original form of payment. Over 60 days? Still no problem. We'll issue your refund in the form of store credit, which you can use like cash on our website.


Return unused, open box products within 30 days.

Open box but still unused? We can help. We’ll issue your refund to the original form of payment minus a small 10% restocking and handling fee.

Some exclusions apply, for more information go to Return & Replacement Details.

Skip to the end of the images gallery
main product photo
Skip to the beginning of the images gallery
Details

Why does BRS recommend this?

The Hanna Alkalinity checker is an awesome little tool that now will give results in DKH values that are much more common in the aquarium hobby. It will also give you accurate easy to read results with the large LCD display. We like the repeatable results and ability to purchase replacement reagents when needed. The biggest key with Hanna checkers is keeping the vials nice and clean for consistent results.

 

Uses Hanna HI772-26 liquid reagents

Three simple steps to results. The Hanna Alkalinity Checker bridges the gap between simple chemical test kits and professional instrumentation. Accurate, affordable and easy to use. First, zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the Hanna Alkalinity Checker, press the button and read the results. Done.

 

Easier to use and more accurate than chemical test kits

Chemical and titration test kits have limited accuracy and very hard to repeat that usually will rely on the human eye and lighting to determine the reading. Hanna's HI772 Alkalinity Checker is much more reliable with their single light source with a fixed wavelength that will give the electronic checker the ability to make repeatable measurements time after time. Similar measurement devices are used by labs and large-scale testing facilities for their dependable and precise measurements.

 

Dedicated to a single parameter

Instead of a single unit doing everything, each Hanna Checker is designed to perform a test for a single parameter. This allows the test to have greater precision while also making it easier to use overall.

 

Small Size, Big Convenience

Weighing a mere 65 g (2.3 oz.), the Checker®HC easily fits into the palm of your hand or pocket. Use for quick and accurate on the spot analysis. Single-button operation: Zero and Measure Operated by a single AAA battery.

 

Specifications:

  • Range: 0.0 to 20.0 dKH
  • Resolution: 0.1 dKH
  • Precision: ±0.3 dKH ±5% of reading
  • Light Source: LED @ 610 nm
  • Light Detector: Silicon photocell
  • Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
  • Battery Type: (1) 1.5V AAA
  • Auto-off: After 10 minutes of non-use and after read
  • Dimensions: 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5")
  • Weight: 64 g (2.25 oz.)
  • Method: Colorimetric method

 

What's Included

  • HI772 Checker
  • 2 sample cuvettes with caps
  • 1 bottle of alkalinity reagent hi772-26
  • 1 ml syringe and tip ­­­
  • battery
  • instructions
  • quick start guide.
More Information
More Information
SKU 210018
UPC 696391997779
Instruction Manual Operating Instructions
Aquarium Type Saltwater
Reviews 115
Write Your Own Review
You're reviewing:Alkalinity DKH Colorimeter HI772 Hanna Checker - Marine Water
Your Rating
Product Questions

Product Questions

Do you use the extra tip for the syringe just to fill the syringe with the reagent or do you fill the reagent to 1mill+extra tip full into the vial? thanks!
Question by: Benjamin on Apr 28, 2017, 6:00 PM
0
Hey there,
The tip should be attached to the syringe prior to drawing the reagent fluid. You will want to draw the plunger to the 1mL mark, and the actual fluid will not actually be drawn into the syringe, but will just be drawn into the tip. This ensures more consistent dosing, and avoids fluid fouling the syringe portion.

Hope this helps!
Answer by: Zack on May 1, 2017, 5:55 PM
0
What the difference from this an the HI775?
Question by: alexander serrano on Mar 22, 2017, 8:24 PM
0
Thanks for reaching out to us! The HI755 gives you a reading in PPM, which can be converted into DKH. The HI722 gives you a result that is already converted into DKH. Please let us know if you have any other questions!
Answer by: Eric Crees on Mar 23, 2017, 4:58 PM
0
This checker includes a tip with the syringe . Do I NEED to use three tip to get the properly calibrated reading. Or can I use the 1ml marking on the syringe
Question by: Steven Mashburn on Mar 6, 2017, 2:28 PM
0
Hey there,
While there are those that do not use the tip for drawing reagent, the manufacturer does specifically recommend using the tip for the best consistency and accuracy, and we recommend following their directions.

Have a great day!
Answer by: Zack on Mar 9, 2017, 4:45 PM
0
How many tests will the included reagent perform.
Question by: Kaietan on Nov 18, 2016, 1:57 PM
0
Hey There,
This checker includes 25 tests. If you have any other questions, let us know!
Answer by: Jason Smith on Nov 18, 2016, 2:26 PM
0
Hanna list a calibration kit specifically for the HI772. Do you carry this or will the one for the HI775 work?
Question by: Deborah Yanko on Jul 1, 2016, 10:54 PM
0
You can use the kit from the 775, the 772 checker is pretty much identical, but gives a readout of dKh instead of PPM.
Answer by: Valerie on Jul 6, 2016, 12:10 PM
0
The spec says that the accuracy is +/-0.3 and +/- 5% of reading. So a reading of 10.0 could really be anywhere from 9.2 to 10.8. That's huge. Is that the spread of errors over many checkers and I could be lucky and get a good one, or is that the spread of measurement errors for any particular checker?
Question by: Boz on Apr 28, 2016, 8:41 AM
0
Great question!
The dKH checker by Hanna is one if the easiest to use and just as accurate as all current hobby grade test kits for dKH currently available. Feel free to let us know if you have any further questions!
Answer by: Connor on Apr 28, 2016, 1:28 PM
0
Will they provide a new reagent for this new HI772 Alk Checker (dKH) or does the previous HI755-26 reagent work?
Question by: Bosco Yung on Mar 24, 2016, 6:27 PM
0
Great question!
This checker will use the same reagent as the HI755-26. Feel free to let us know if you have any further questions!
Answer by: Connor on Mar 25, 2016, 9:08 AM
0

SIGN UP FOR THE BULK REEF SUPPLY NEWSLETTER

Don’t be the last to know this holiday season about sales, specials, new products, and more!

Sign Up Now
BRS Fresh https://media2.cdn.bulkreefsupply.com/media/logo/stores/1/BRS-Logo-498x174.png https://fresh.bulkreefsupply.com/
BRS Fresh Bulk Reef Supply
  • Facebook Opens a new window
  • Youtube Opens a new window
  • Instagram Opens a new window
  • TikTok Opens a new window

Contact

  • 763-432-9691

  • 8am - 6pm CT M-Th
    9am - 4pm CT Friday
  • support@bulkreefsupply.com
  • 6325 Sandburg Road, Suite 200
    Golden Valley, MN 55427 US

Bulk Reef Supply
About Us
Customer Service
Careers
Wholesale Customers
Instructions
Terms & Conditions
Customer Center
Preferred Reefer Program
International Shipping
Returns & Replacements
Payment, Pricing & Promos
Shipping & Delivery
APL Star Logo
© 2025 Aperture Pet & Life. All Rights Reserved.
Privacy Policy

item(s) Added to Your Cart

Product Name

View Cart Checkout Now
You may also like
S-Curved Scissors (9.8 inch)
Fluval
S-Curved Scissors (9.8 inch)
$26.99 $26.99

Insta-set Super Glue Accelerator
Bulk Reef Supply
Insta-set Super Glue Accelerator
Rating:
94%
1 Review
$5.99 $5.99

Mag Float 25 Mini Glass & Acrylic Aquarium Cleaner
Mag-Float
Mag Float 25 Mini Glass & Acrylic Aquarium Cleaner
$16.29 $16.29

BlackWater Humic Water Conditioner
Brightwell Aquatics
BlackWater Humic Water Conditioner
From: $8.22

Choose Options
Aqua Garden/Bright Stone Aquarium Backgrounds
SeaView
Aqua Garden/Bright Stone Aquarium Backgrounds
From: $2.10

Choose Options
AF Lava Soil (5 L)
Aquaforest
AF Lava Soil (5 L)
$19.99 $19.99

Bug Bites Color Enhancing Flakes
Fluval
Bug Bites Color Enhancing Flakes
$7.99 $7.99

Betta World - Rose Cream Substrate (1lb)
Aqua Natural
Betta World - Rose Cream Substrate (1lb)
$7.48 $7.48

Dual-Sided Substrate Shovel (12.6 inch)
Fluval
Dual-Sided Substrate Shovel (12.6 inch)
$11.49 $11.49

GloFish® Water Conditioner for Bettas
GloFish®
GloFish® Water Conditioner for Bettas
$6.19 $6.19

Login and Registration Form

  • Login
  • Register

Registered Customers
If you have an account, sign in with your email address.
Forgot Your Password?
or

Login with Your Social Profile Login with
Continue with Google
Continue with Facebook
Continue with Apple

Personal Information
Sign-in Information
Password Strength: No Password
Back
or

Login with Your Social Profile Login with
Continue with Google
Continue with Facebook
Continue with Apple
  • Forgot Your Password?

Please enter your email address below to receive a password reset link.
Go back