Phosphate Low Range Colorimeter HI713 Hanna Checker - Fresh & Marine Water

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  • Controlling Phosphate

Phosphate Low Range Colorimeter HI713 Hanna Checker - Fresh & Marine Water

93% Recommend this to a friend (226 of 243)

SKU: 206200

reg. $49.00

Special Price: $44.10

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Quick Overview

Why does BRS recommend this?

The Hanna Phosphate checker is an awesome little tool that will give you accurate easy to read results.  If you have bad eyes or have a hard time with color change test kits, the digital read out on the Hanna checkers is super nice and easy to read.  The biggest key with Hanna checkers is keeping the vials nice and clean for consistent results.

Three simple steps to results. The Hanna Phosphate 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 Phosphate Checker, press the button and read the results. Done.


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Product Questions

I see on here that some users suggest buying the hi736 instead. Which one will work best to determine your overall PO4?
Question by: Justin on Jun 3, 2016 9:26:00 AM
Great question!
We personally use the Phosphate low range in house as it is accurate enough and we do not need to convert the reading from Phosphorous to Phosphate. While the Ultra Low range will give extra decimal placed to your answer We find this is not the most important. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Jun 8, 2016 3:01:00 PM
Since the Hi713 and reagents are the same for both fresh water and marine, is it safe to assume variations of salinity will have no bearing on the results?
Question by: William Neiman on May 2, 2016 2:01:00 AM
Great question! That is a safe assumption to make, salinity should not effect the reading with this checker.
Answer by: Carter (Admin) on May 4, 2016 1:57:00 PM
how many test does this kit provide. Thanks.
Question by: Mark on Nov 30, 2013 6:00:00 AM
Hey Mark,
The phosphate checker itself comes with enough reagent for 5 tests. Reagent refills are sold in packs of 25 and can be found right here:
Answer by: Bulk Reef Supply on Nov 30, 2013 6:00:00 AM
Does this meter require periodic calibration with some kind of calibration solution?
Question by: Eric on Jun 19, 2014 8:50:00 PM
Hi Eric,
One of the first steps every time you test is to zero out the meter, then you add reagent and test the actual sample. This is done every test but It does not require any sort of extra calibration procedure on top of that.
Answer by: Bulk Reef Supply on Jun 19, 2014 8:50:00 PM

Full Details

HI713 Phosphate Low Range Owners Manual

Adaptation of Standard Method 4500-P E Accuracy 4% ±0.04 ppm (mg/L) of reading 0.04 ppm (mg/L) resolution (250 points) Large, easy to read digits Auto shut-off.

Dedicated to a single parameter

Designed to work with HANNA's powder reagents Uses 10 mL glass cuvettes.

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.


  • Range: 0.00 to 2.50 ppm (mg/L)
  • Resolution: 0.01 ppm (mg/L)
  • Precision: ±0.04 ppm (mg/L) ±4% of reading @ 25°C
  • Light Source: LED @ 525 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 2 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: Adaptation of Standard Method 4500-P E.



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  • **Be Aware** Not Suitable For Reef Aquarium Testing! By Julio on 10/16/2016

    Not sure why Hanna doesn't just Discontinue this product even though they know it's more suited for "Fresh" water than marine usage. I've owned this for 6 months and never had the digits read above 0.00 ppm! Had the signs apparently of having phosphates with algae growing constantly on my glass! Went and purchased RedSea's Phosphate test kit and Salifert's test kit just to make sure and too my surprise not only I had phosphates present in my reef tank but that the results showed RedSea 0.8 ppm Salifert 0.07 but yet my Hanba HI-713 can not detect these units! I emediatly called Hanna Headquarters in Smithfield Rhode Island and to my surprise, they told me that the HI-736 ULR which is the "Ultra Low Reading" test kit would be more suitable for me, which really indicates that thier aware of this problem! IMO, maybe they just never made an attempt to recall this model of kit in in order to save tons of money they just went ahead and slapped on the "Fresh & Marine " label and kept it as is but clearly if you don't see a "Fish" label in front of your handheld with the "Marine" label as well than it's not suitable for Marine! Unfortunately this problem is not going away! Reefers Be Advised, purchase the ULR instead!
  • The product it's really easy to use By Joseph on 10/2/2016

    Hanna Phosphate Low Range Colorimeter works well . Fast and accurate
  • Great.. packaging needs improvement. By Yus on 9/26/2016

    The product it's great and easy to use. Take away from having to match colors. However, the packages the reagent comes in need to be replaced with a scoop method because it's hard to get all the power out of the packages.
  • Unsure of accuracy By Mark on 9/3/2016

    Iva had this a couple weeks now and have yet to get a reading above 0.00 after 4 tests. I run hc gfo but should still have some phosphates right?
  • Really only 6 tests By Jaimeadams on 7/15/2016

    I am disappointed with the fact that it only comes with enough regent for 6 tests. Sure the digital read out is awesome and very helpful, but I really feel that for the price I should be able to test more than 6 times before having to give them more of my money
  • Easy to use By Eric Johnson on 4/6/2016

    I hate trying to match colors on tests (ok, I'm also slightly red-green colorblind so that doesn't help!) and this makes it so much easier. Doesn't come with very many test packets so if you'll be doing a lot of testing you'll want refills but they're pretty inexpensive.
  • Dies right after warranty By SD Reefer on 4/6/2016

    Problems with the light sensor the minute the 6 month warranty was up. Randomly worked and then completely dead. Tech support offered up $95/hour service or they said I'm welcome to order a another from them. Don't think so. The results I was able to get when it worked were extremely varied and I couldn't stand trying to get all the powder out of those tiny packets. Need to rethink design on those. Not pleased unfortunately.
  • Great Checker By KerryF on 3/29/2016

    One star off for those silly packets for the reagent. Works well and seems very accurate. Lid seems to have a hard time staying closed with a vial in it the big deal really.
  • Nice for Accurate Low Range Testing By Michael on 3/18/2016

    Like many other Hanna checkers this product takes the guess work out of phosphate testing. I have a special loathing for trying to decipher color coded phosphate test kits and this helps me solve that issue. I had to take 1 star off because getting the power into the vial is brutal, and I mean brutal.
  • It works, just have to get use to the reagents. By jay on 3/5/2016

    Good too have two vials. One to set the checker, the other one to have the reagent all ready mixed.
  • Pointless By Coverttadpole on 1/20/2016

    Save your money. I get more accurate results using API phosphate test and its significantly less money. Measures ppm just like API however the Hanna checker shows 0.00 and API shows 0 to 0.25 ppm. Even contacted Hanna to see if it was broke and their first response was to buy the HI736. So they seem to be aware that it's junk. Also, once you open the box it's yours. Bulk reef supply does not except returns on opened items. A little hard to consider buying a second piece of equipment when the first one doesn't work as it should. Also bought the HI758 calcium checker that works flawless. Watch the YouTube video as the instructions are not clear.
  • Works great By Bruce on 12/17/2015

    'Reagent packets are difficult to open and pour into vial without spilling any. Otherwise it works great.