Hanna Phosphate checker reagent compatibility

[mjw011689]

I'm sure i already know the answer to this one, but are any of the hanna reagents compatible with more than one of their phosphate checkers?

Specifically, is the hi774-0 reagent compatible with the HI713 checker? Picked up the wrong reagent and have already used a few before i realized the numbers didnt match. I am getting a reading of 0.04, but i'm worried that's not accurate since the checker is the "low range" and the reagent is the ultra low range. I'm assuming the amount of powder in the packets is different from one reagent to another, so my guess is my readings are not accurate.

 

[Salty_Northerner]

Not sure but I don't think the amount has anything to do with it. Give Hanna a call and they'll have all the info you need.

 

[mjw011689]

Took your advise and called them... turns out I've got it all wrong. The HI 713 is only for freshwater, and will not work on saltwater. The HI 774 reagent is the correct reagent for the marine low-range phosphate checker, but obviously since its for marine it will not work properly with the freshwater checker. According to Hanna, they are different chemicals altogether.

Luckily i inherited this phosphate checker for free, but now I will need to buy the 774. Now the fact that BRS has so many different phosphate checkers for sale makes more sense. Also, the easy way to know if its the right one or not, apparently they say "marine" right on the front of the checker. Fantastic

 

[Meekoreef]

Took your advise and called them... turns out I've got it all wrong. The HI 713 is only for freshwater, and will not work on saltwater. The HI 774 reagent is the correct reagent for the marine low-range phosphate checker, but obviously since its for marine it will not work properly with the freshwater checker. According to Hanna, they are different chemicals altogether.

Luckily i inherited this phosphate checker for free, but now I will need to buy the 774. Now the fact that BRS has so many different phosphate checkers for sale makes more sense. Also, the easy way to know if its the right one or not, apparently they say "marine" right on the front of the checker. Fantastic

I know this is an old post but i don't know why Hanna would have told you the 713 is only for freshwater unless they changed it. They told me it works fresh/marine from 0.00 to 2.50 ppm. The 714 does a more detailed pull 0.00-0.09 for ULR systems. The Phosphorus checker does the test in ppb instead of ppm so you have to calculate the results to get the range ppm. The 713 is also listed on several online sites as marine

Saltwateraquarium.com​

HI713 Phosphate Low Range Checker HC (Saltwater) - Hanna Instruments​

BRS site:

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

this is from Hanna's site:

The HI-713 Phosphate Checker provides an accurate solution for measuring low range phosphate within both marine and freshwater fish tanks.

BRS did a video also on Youtube regarding the difference in the HI713, HI714 and the Phosphorus checkers testing on reef tanks.

I have used the 713 for years on reef tanks with good results measures from 0.00-2.50. If you want a better range for Ultra low go with the 714 which does from 0.00-0.09. I am sure by now you probably have purchased another one. But i know new reefers search this and may benefit.

Just stumbled across your post.

 

[mjw011689]

I’m assuming you typed that last bit wrong, but the HI714 test 0.00-0.90, not 0.09


Also, directly from Hanna’s site, the HI713 has a much larger range, up to 2.5. However, it does not say that it can be used on marine anywhere. Their site specifically says aquaculture, agriculture, education… which to me would imply freshwater.


for kicks and giggles, I did end up getting the 714. Running a side by side test gave me very different numbers. The 713 was reading zero, and the 714 was reading .15 which is a pretty large difference since their tolerance is .01

 

[hanabata]

I have a HI713 checker and also accidentally bought HI774 Regent.

my checker with the proper regent seemed to have been working fine in my saltwater tank for the last year. But who knows? Maybe I was getting wrong readings that whole time. which may explain why my corals grow so slow. Haha

assuming my checker does work fine for saltwater, do you guys know the algorithm I should use to convert the measurement with the HI 774 regent to the proper measurement?

pretty bummed my LFS sold me the 713 if in fact it is only for freshwater.

 

[Meekoreef]

I have a HI713 checker and also accidentally bought HI774 Regent.

my checker with the proper regent seemed to have been working fine in my saltwater tank for the last year. But who knows? Maybe I was getting wrong readings that whole time. which may explain why my corals grow so slow. Haha

assuming my checker does work fine for saltwater, do you guys know the algorithm I should use to convert the measurement with the HI 774 regent to the proper measurement?

pretty bummed my LFS sold me the 713 if in fact it is only for freshwater.

Just had Hanna on chat with their sales and technicians. As stated above they confirmed yet again that the 713 is not for freshwater only it works with saltwater as well. I have been using mine for years and compared the results to an LFS test and salifert. It works just fine on a reef tank. If you have ultra low and from 0.00 to 0.9. It comes from several large sellers as well as the manufacturer as well. Below is a post from another reef2reef post. Also there are surveys where 29% of reefers use the HI713.

1. HI713 Phosphate Low Range
   • Not accurate at lower values that are attained by good Chaeto filtration and GFO.
   • Test could read 0, when you actually do have enough phosphate. Not safe.
   • Only buy if you plan on keeping your phosphate level higher than what is recommended for reef tanks (<0.2 ppm)
   • Upper limit (2.5 ppm) is so high that it's actually a bit useless.
2. HI736 Phosphorous Ultra Low Range
   • Earlier "flawed" version of HI774
     • Needs mathematical conversion to phosphate
     • Timer is too strict
     • Upper limit is too low (0.6 ppm)
3. HI774 Phosphate Ultra low Range
   • Later improved version of HI736
     • No need for conversion
     • Timer extended
     • Upper limit extended (0.9 ppm)

 

[Meekoreef]

I’m assuming you typed that last bit wrong, but the HI714 test 0.00-0.90, not 0.09


Also, directly from Hanna’s site, the HI713 has a much larger range, up to 2.5. However, it does not say that it can be used on marine anywhere. Their site specifically says aquaculture, agriculture, education… which to me would imply freshwater.


for kicks and giggles, I did end up getting the 714. Running a side by side test gave me very different numbers. The 713 was reading zero, and the 714 was reading .15 which is a pretty large difference since their tolerance is .01

My information was from Hanna themselves that the 713 is marine as well.

Just had Hanna on chat with their sales and technicians. As stated above they confirmed yet again that the 713 is not for freshwater only it works with saltwater as well. I have been using mine for years and compared the results to an LFS test and salifert. It works just fine on a reef tank. If you have ultra low and from 0.00 to 0.9. It comes from several large sellers as well as the manufacturer as well. Below is a post from another reef2reef post. Also there are surveys where 29% of reefers use the HI713.

1. HI713 Phosphate Low Range
   • Not accurate at lower values that are attained by good Chaeto filtration and GFO.
   • Test could read 0, when you actually do have enough phosphate. Not safe.
   • Only buy if you plan on keeping your phosphate level higher than what is recommended for reef tanks (<0.2 ppm)
   • Upper limit (2.5 ppm) is so high that it's actually a bit useless.
2. HI736 Phosphorous Ultra Low Range
   • Earlier "flawed" version of HI774
     • Needs mathematical conversion to phosphate
     • Timer is too strict
     • Upper limit is too low (0.6 ppm)
3. HI774 Phosphate Ultra low Range
   • Later improved version of HI736
     • No need for conversion
     • Timer extended
     • Upper limit extended (0.9 ppm)