Does the KH director allow you to submit a baseline or reference, in order to offset readings (similar to Alkatronic)? My Hanna and Red Sea tests are always spot on with each other. New reagents and I do multiple tests to be sure....
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I agree with this and would go as far as saying more than one month.I have the GHL reference solution and find my KH director and Hanna checker to be within 0.2dkh of it. Accurate calibration of dosing heads 1 and 2 is critical to get an accurate measurement. Even a tiny amount of air in the reagent line will also cause issues.
Mine KH director wasn't very accurate for the first few samples but it kept getting better over the course of a week and now I trust it completely.
As an aside, the Hanna alk reagent has a very finite shelf life. If it's been open for more than 2 months I wouldn't trust its accuracy completely.
Sigh... just set up my KH Director. I have taken 4 readings with it to be sure it was consistent. 6.6, 6.5, 6.5, 6.5
And the Hanna checker.. yea.. it reads 8.1 and has read 8.1 every time I used it.
That’s a pretty big split between the two.
I’m going to take a sample to the LFS and have them test it.
My tank has nothing in it accept water and the marco rock I cycled it with. My tank has all Tropic Marin Pro reef in it.
Really not looking forward to recalibrating the doser again.. but odds are I will need to.
I want to be sure the numbers are correct before I go and use the offset. I want to be sure I didn’t screw up. Also if it comes down to using the offset, my issue is why doesn’t the $800 tool work better than the $60 tool?Is the offset not working for you? If you trust Hanna (I certainly do) I'd just make the adjustment and you should be good to go.
Just observation, but I'm a recent KHD owner too that had large initial variances between my checker when testing the 7.5 reference solution (Hanna would be 7.8, KHD was 6.5). How is your waste container situated? I was getting about 1.2-1.3 dKH spread until I changed to a bulkhead drain cap for both waste and vent lines, versus dangling the tubes in the vessel. For whatever reason, that made all the difference. As well, make sure that reagent line is calibrated to the nearest tenth, it makes a large difference.Sigh... just set up my KH Director. I have taken 4 readings with it to be sure it was consistent. 6.6, 6.5, 6.5, 6.5
And the Hanna checker.. yea.. it reads 8.1 and has read 8.1 every time I used it.
That’s a pretty big split between the two.
I’m going to take a sample to the LFS and have them test it.
My tank has nothing in it accept water and the marco rock I cycled it with. My tank has all Tropic Marin Pro reef in it.
Really not looking forward to recalibrating the doser again.. but odds are I will need to.
I was thinking that possibly too but those things are huge at the base. I would not be able to fit 2 in the cap of a jug. For my set up the vent and drain lines are just an inch into the cap. Very slim chance it will fill the jug unless something goes really wrong.My guess is they mean a 1/4 push connect bulkhead so the end of the line doesn't get submerged.
R0420429: 1/4" Tube Bulkhead Union
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Nice, I learned about something new today . Much slimmer than what I was thinking!I won't be at home for like 10 hours, but it's basically two of these in the cap of a 4L jug.