Red Sea Fish Pharm ARE21410 Saltwater KH/Alkalinity Pro Test Kit for Aquarium, 75 Tests
$44.99
Price: $44.99
(as of Oct 17, 2025 10:51:05 UTC – Details)
Alkalinity Pro is a high accuracy (+/- 2. 5ppm) Titration Test Kit (75 tests) – incl. professional titrator
Is Discontinued By Manufacturer : No
Product Dimensions : 5.12 x 5.51 x 3.15 inches; 1 Pounds
Item model number : 306011
Date First Available : August 18, 2004
Manufacturer : TopDawg Pet Supply
ASIN : B006L48WLI
Best Sellers Rank: #214,351 in Pet Supplies (See Top 100 in Pet Supplies) #314 in Aquarium Test Kits
Customer Reviews: 4.5 4.5 out of 5 stars 49 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Country Of Origin: United States
The Package Length Of The Product Is 5.7007874015748 Inches
The Package Width Of The Product Is 5.09842519685039 Inches
The Package Height Of The Product Is 3.2007874015748 Inches
Customers say
Customers find the test kit easy to use and appreciate its quality.
9 reviews for Red Sea Fish Pharm ARE21410 Saltwater KH/Alkalinity Pro Test Kit for Aquarium, 75 Tests
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$44.99
James –
great test kit. easy to use
what a great test kit. I really like the ease of use and how clear the results are. will buy again
Elizabeth –
Good
Test tank well
Brallan Morgado –
Easy to use
Very good test
Sara M Olson –
Hard to Read Results
Unlike other Red Sea test kits, this test kit has a minor color change. It can be challenging to read. It turns from a pale blue to a pale green and then to a pale yellow if you have added too much titrate. I always have to have my lights turned up bright and test against a white surface, otherwise I miss the change.Other Red Sea test kits are much easier to read, i.e., calcium and magnesium, and are super easy to use.
Tim Farnham –
Five Stars
Simplly the best AK tester available unless you go with a optical unit. Love this!
Timothy Lucas –
Four Stars
easy to work with. Just follow the directions
DRP –
Works well new, but test becomes nearly impossible to read after a few months and long before expiration date
I have the full Red Sea pro test kit. The Mg and Ca tests are pretty easy to read and have remained consistent in the titration color change. The Alk test leaves something to be desired though. When I first got it the color change was very clear and easy to read, however after 4-5 months the color it changed to became increasingly more yellow (vs the original more rust looking color) and did not have a clear change point. The Alk reagent didn’t expire for nearly a year either. I contacted Red Sea and they sent me a replacement Alk reagent vial (Received November of 2015). Once again it was super easy to read and the color matched the more rust looking color on the card. Since then this test has done the exact same thing though and is now basically impossible to read. Expiration date on this vial is 12/2017 and I have nearly half the vial left. I’ve kept the vial tightly closed in the dark. I’m moving to the Hanna checker for Alk as I’m not going to waste any more money or risk my aquarium on this test you apparently need to replace every 4 months or so.
Gabriel –
Fiable
Bueno
Ajay –
This one is working only on fresh water, not suitable for salt water,