What to trust??

ChuckTownReefer

Active Member
View Badges
Joined
Dec 19, 2019
Messages
186
Reaction score
49
So I have had my trident set up for about a month just put in my second alkalinity reagent bottle. After I did that it seems to have thrown everything off. All the reagents being used are the ones that came with the unit. I tried to recalibrate it the numbers changed but still off. Trident was reading 8.3dkh, hanna 8.9dkh.

That was yeasterday so today I trashed those reagents and open a new box put those in and did another recalibration and now its saying

Alkalinity
trident 7.98
Hanna 8.3
Salifert 8.6

Calcium
Trident 422
Salifert 385

Out of hanna calcium reagent. So couldn't compare.

I truly don't know what to trust.

Let me know what you guys think I should do/trust.
 

Reef man 89

Valuable Member
View Badges
Joined
Oct 8, 2016
Messages
1,821
Reaction score
1,274
Take your left over calibration guild and test it in the Hanna and see what you get. You know what the Hanna should read with the valves on the bottle
 

TheHarold

2500 Club Member
View Badges
Joined
Oct 3, 2015
Messages
4,846
Reaction score
8,187
So I have had my trident set up for about a month just put in my second alkalinity reagent bottle. After I did that it seems to have thrown everything off. All the reagents being used are the ones that came with the unit. I tried to recalibrate it the numbers changed but still off. Trident was reading 8.3dkh, hanna 8.9dkh.

That was yeasterday so today I trashed those reagents and open a new box put those in and did another recalibration and now its saying

Alkalinity
trident 7.98
Hanna 8.3
Salifert 8.6

Calcium
Trident 422
Salifert 385

Out of hanna calcium reagent. So couldn't compare.

I truly don't know what to trust.

Let me know what you guys think I should do/trust.

I don’t think you are calibrating correctly. You are supposed to calibrate 48 hours after changing reagent, and it sounds like today you tried to calibrate immediately after changing reagent. You need to wait 48 hours to ensure the lines are full of the new reagent, instead of the old stuff.

Calibrating prematurely could very well cause less accurate results, as you are calibrating with the old reagent still in the lines.

 
OP
ChuckTownReefer

ChuckTownReefer

Active Member
View Badges
Joined
Dec 19, 2019
Messages
186
Reaction score
49
I don’t think you are calibrating correctly. You are supposed to calibrate 48 hours after changing reagent, and it sounds like today you tried to calibrate immediately after changing reagent. You need to wait 48 hours to ensure the lines are full of the new reagent, instead of the old stuff.

Calibrating prematurely could very well cause less accurate results, as you are calibrating with the old reagent still in the lines.



I thought the 48 hours was only for the first time start up. Like when you first get it. Never saw anything about everytime you changed reagents. When I replaced the reagents I primed all lines and reagents. But ill try again tomorrow that will be 48 hours but that's my last calibration solution.
 

NeptunePaul

Community Member
View Badges
Joined
May 13, 2019
Messages
36
Reaction score
56
Location
Morgan Hill
It isn't necessarily 48 hours, but it is 3-4 test that demonstrate precision. After changing reagents and even after priming the lines it is possible that the first test or two will need to adjust to the new reagents. If there is a significant jump after changing reagent, then we recommend running a few back to back tests before calibrating. If there isn't a jump, then waiting the 48 hours is just fine as well.
 

Tacticool-Reefer

I have spoken!
View Badges
Joined
Nov 26, 2020
Messages
235
Reaction score
290
Location
U.S.A.
Just my two cents so take it for what it’s worth, but it would seem that a “purge” the line/s programing feature would be needed/advantageous in order to maintain higher degree accuracy when swapping out new reagent bottles. If done correctly this might eliminate all the inaccuracies associated to the swap out. Yet this also means that you would be wasting reagent to some extent. It’s a double edge sword but I’d rather have accuracy over a few milliliters of reagent any day of the week.
 

NeptunePaul

Community Member
View Badges
Joined
May 13, 2019
Messages
36
Reaction score
56
Location
Morgan Hill
Just my two cents so take it for what it’s worth, but it would seem that a “purge” the line/s programing feature would be needed/advantageous in order to maintain higher degree accuracy when swapping out new reagent bottles. If done correctly this might eliminate all the inaccuracies associated to the swap out. Yet this also means that you would be wasting reagent to some extent. It’s a double edge sword but I’d rather have accuracy over a few milliliters of reagent any day of the week.
That is what occurs during the reagent replacement task already. The issue is when you change reagent kits and your reagent kits are from two different batches. Some batches are a bit different than others, and even the smallest variation can cause a large change in your numbers. When the batch you are on is different than the batch you are going to, then it will be helpful to calibrate a bit sooner as I described above.
 

NeptunePaul

Community Member
View Badges
Joined
May 13, 2019
Messages
36
Reaction score
56
Location
Morgan Hill
Yes, they are on the bottom of the bottles, but IMO they don't have much value to you, the end-user. It very likely to have batches with different numbers that don't show much difference between each other at all- that is far more common. When numbers jump significantly after changing reagent, that it indicative of needing to do a calibration a bit sooner. Not the actual batch number itself.
 

What types of R2R interview articles are you most excited about?

  • Specific reef topics! (List the ones you'd like to see us cover in the thread.)

    Votes: 73 39.2%
  • Specific reef personalities! (List the people you'd like us to interview in the thread.)

    Votes: 10 5.4%
  • Not that concerned about the topics...I just wanna see the awesome PICTURES!

    Votes: 36 19.4%
  • All of the above!! ...and yes, I'll list some in the thread. :-)

    Votes: 67 36.0%

Online statistics

Members online
2,049
Guests online
4,837
Total visitors
6,886
Top