Which hanna phosphate checker?

smartwater101 · Apr 19, 2019

For those of you who use something like google sheets, I made this to include the margin of error in my spreadsheet. (row 4 is what you want to be looking at, row 5 is just an example) It also makes it so the range can't go negative. Just drop your Hanna results into A4 and you're good to go!

B4) =A4*3.066/1000

C4) =MAX(ROUND(((A4-5)*3.066/1000)*0.95,3) , 0 )&" - "&MAX(ROUND(((A4+5)*3.066/1000)*1.05,3) , 0 )

Enjoy!

harthag12 · May 8, 2019

Thanks for this thread question & answers, I need to purchase a phosphate kit & this answered my questions on which to go for. I'll be ordering the HI-774 tonight.

Coral Keeper · Sep 8, 2019

Fantastic thread! Helped me identify which to get, just ordered the HI-736 checker

jsker · Sep 8, 2019

Coral Keeper said:
Fantastic thread! Helped me identify which to get, just ordered the HI-736 checker

That would be the right one.

LilElroyJetson · Sep 9, 2019

harthag12 said:
Thanks for this thread question & answers, I need to purchase a phosphate kit & this answered my questions on which to go for. I'll be ordering the HI-774 tonight.

Coral Keeper said:
Fantastic thread! Helped me identify which to get, just ordered the HI-736 checker

Glad you guys found it helpful!

Here’s the link to the Hanna Conversion Charts for anybody else who needs it:

Hanna ULR Phosphorus Checker ppb to ppm phosphate conversion chart

Dave cobb · Jan 1, 2021

LilElroyJetson said:
No, that was a good catch, thank you! I confused myself looking at the spec sheets on Hanna’s website! I re-worded my above post, but while the margin of error for each checker is actually close and either should get the job done, the 736 becomes more accurate at that ultra low range because it’s measured in ppb, so while at a higher ppb the readings may not vary much between the 736 and 774, at the lower range closer to 0 ppm, that more precise reading will be more helpful for those looking to strictly keep phosphates below .03. The 774 margin of error of .02 would be too much to trust.

For example:
HI-774 reads at .03 ppm, it could be .03 ppm, but also could be .01 ppm or even as high as .05 ppm.

HI-736 reads at 10 ppb (or .031 ppm), it could be accurate but it could also be 5 ppb (.015 ppm) or even 15 ppb (.046 ppm). This example is why I was saying the margin of error is similar. The 736 margin of error, in this example, is not far off from the 774, but it matters more the closer you want your phosphates to zero. And I’m a nerd lol.

With all that being said, either will do just fine for most people, with the 736 maybe more suitable to those keeping an ULNS.

Here’s the conversion chart for PPB to PPM if anybody wants to peek at it:

HI good chart. Using Hanna checker HI 713 done test showing on face test 0.52 ppm can any one give me advice done 2 water changes on a 450lt water change 1st one 130lt water change then three days later 75lt water change now showing me 0.35ppm happy days going lower then tried day later on test gone up again to 0.56 any on got any advice.....And to All happy new year