a WTF moment, brought to you by phosphate and in part by Instant Ocean

[Boga]

Wondering for the folks that are using Hanna ULR HI-736, what is the reagent Lot #. Currently I am using H 025. Possible a bad reagent lot?

I don't know what you guys are using, but mine (H025) looks like is a defective lot, acknowledged by Hanna. Check out the thread below:
http://www.nano-reef.com/topic/333784-problems-with-hanna-phosphate-and-phosphorus-checkers/page-3

It is possible that in the same lot some kits be Okay, some bad.

 

[Reef Hero]

Both of my packs of reagent for the Hanna ULR Phosphorous Checker are Lot # H025.....

I never got time to try a new battery yet.....

The funny thing is that my old reagents seemed to work ok but the word "phosphorous" was spelled "phopsphorous"..... Lol


Sent from my iPad using Tapatalk

 

[unibob]

I'm looking into this for the people who purchased from me.

 

[Reef Hero]

Thanks jerry! I bought one pack from you at toronto frags and got another pack from canada corals there as well. I did this so i could try diff lots i guess but both seem to be the same lot#..... and both seem to give strange and inconsistant reaults.

 

[Salty Cracker]

I'll try the new reagants today, I don't think I've checked phosphate for a while...

 

[Boga]

Is the Hanna HI 736, ULR good for fresh water (RODI), too? I've learned that Alkalinity and pH can influence the measurements.

Follow up on my question above. Answer from US Hanna Tech Support:

Bogdan,

When the meter says Marine it is intend for salt water samples.  You could try the RODI water however, it has never been tested so I cannot tell you how it will perform.

No, pH and alk are not interferences.

Pete

 

[unibob]

I'll try the new reagants today, I don't think I've checked phosphate for a while...

How did it go?

 

[Poseidon]

my reagant lot is h051

 

[unibob]

my reagant lot is h051

Are you making sure your vial is absolutely clean? No finger print or anything?

Have you ever left reagent in vial between tests as it can stain glass.

 

[Poseidon]

[quote author=Poseidon link=topic=7202.msg73881#msg73881 date=1387462980]
my reagant lot is h051

Are you making sure your vial is absolutely clean? No finger print or anything?

Have you ever left reagent in vial between tests as it can stain glass.
[/quote]

nope always rodi bath before and after each test, put a little in and shake it like crazy to clean, also have a home made drying rack
im going to test again today and see where the numbers are.