Mon-Thurs 7am-5pm PST
Fri 7am-4pm PST

Questions about products, orders, shipping?
Contact us by call or email

Seachem Laboratories Multitest: pH & Alkalinity Test Kit

Seachem Laboratories Multitest: pH & Alkalinity Test Kit


Item #: SC4131

In Stock

Seachem Multitest: pH and Alkalinity Test Kit

This kit combines the pH and Alkalinity kits into one kit. This kit features a unique dye that has a pronounced color change between 8.0 to 8.3, making it the easiest kit on the market to read in that critical range. Alkalinity may be read from the same sample in 0.5 meq/L increments.
  • Multi-cavity plate for simultaneous testing of up to 6 tests at the same time
  • Suitable for marine or brackish water
  • Performs over 75 tests
  • Includes reference for test validation
  • Range: pH:7.80-8.70, alkalinity 0- infinity
  • Precision: pH: 0.01 pH units, alkalinity 0.5 mgq/L

Manufacturer information

Seachem Laboratories, Inc. was established in 1980 by Dr. Leo G. Morin. Seachem moved into a state of the art 110,000 square foot facility in Madison, Georgia marking their 25th anniversary in the industry in 2005. This facility includes production and research laboratories, manufacturing, inventory, shipping, and office space.

4 Stars


Reviewed on
July 10, 2012

No, I would not recommend this.

Not good enough

I wanted to like this test, but unfortunately it just isn't good enough. Using the plastic dropper to get the right amount of water to test is easy enough, but I found it wasn't very accurate with the small amount of water as sometimes a drop or two would stay inside the dropper and never make it into the testing tray. Using the alkalinity dropper for the titration test was nearly impossible to do without getting air in the dropper. As you are dropping drops into the test sample, an air bubble will come out and cause a smaller drop. I tried 6 different tests with the same sample and got 4 different results. Also, unless you suck up the perfect amount of the reagent, or risk contaminating it by returning the unused portion to the reagent jar, you are going to get anywhere near 50 tests out of this. I was only able to do about 15. Overall, it's just frustrating.

Was this review helpful? 3 0


Reviewed on
September 10, 2011

Yes, I would recommend this.

Wish I could give five stars!

The pH and Alkalinity kit is very easy to use and fairly accurate.My only gripe, along with others with similar comments, is that the multi-cavity plate is very light and could be unstable if one is not careful. For the alkalinity test, stirring with one hand while dropping the reagent with the other is challenging if you don't have the plate secured. Placing the plate on a folded towel helps. Also it allows light to pass from below which could affect the accuracy depending on your ambient light.Overall it is a very good product and I would definitely buy again.

Was this review helpful? 0 0

daniel kelsch

Reviewed on
September 05, 2011

Yes, I would recommend this.

seachem ph alkalinity

Kit seems to be accurate but kind of difficult to use. The tray sample its placed in is thin light plastic and extreme care has to be taken when mixing not to dump the sample inadvertently. Also the drop dispenser can get air in it while your dispensing and release an "splatter" of reagent that isn't nearly a drop. I have only used API kits previously and they were easier to use but I'm not sure of their accuracy. Bottom line it gets you the numbers you need.

Was this review helpful? 0 0

john mayer

Reviewed on
May 09, 2008

Yes, I would recommend this.

ph alk test

accurate and easy to use!

Was this review helpful? 0 0


Reviewed on
March 09, 2008

No, I would not recommend this.

hard to use and read

I didn't like this test kit. The pipettes and test tray are awkward and hard to use. I also found the color change to be very subtle and hard to match with the reference card. I also have the tetra alk test kit and would recommend it over this one. I think has a great test vial (it's square and doesn't tip over as easily as a regular test tube) and it's easier to use and read.

Was this review helpful? 0 0

carla orear

Reviewed on
November 30, 2007

Yes, I would recommend this.

pH & Alkalinity Test Kit

For the product, I have used it for years and I have found it always to be accurate as all of the MultiTest kits I use. When received I was not shipped the correct kit. However, customer service fixed the problem and shipped me the correct kit that I ordered. Prices are very comparable to the on-line store I have used. Customer service was excellent.

Was this review helpful? 6 0

david johnson

Reviewed on
March 09, 2007

Yes, I would recommend this.

Seachem Multi pH Alk

The kit worked very well. I ordered when getting unusually high alkalinity numbers with my Salifert kit. I ordered this one, plus the LaMotte kit and compared all three on the same sample. The results were identical. The lower cost of the Seachem kit, and the added pH test included will make me a repeat user.

Was this review helpful? 14 0

We use cookies to provide a personalized site experience. By continuing to use & browse this site, you agree to our Privacy Policy.