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- Jan 6, 2018
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I was going to use a BRS lab grade probe. If you put the probe all the way down and touch the bottom how far should it be pulled back up for clearance from bottom?
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use the other one as a guide and add 1mm and that is your line. The better question is whether the lab grade is better but no one answers.I was going to use a BRS lab grade probe. If you put the probe all the way down and touch the bottom how far should it be pulled back up for clearance from bottom?
That would be nice to know. You would think it would beuse the other one as a guide and add 1mm and that is your line. The better question is whether the lab grade is better but no one answers.
It is claimed to be safe but there is no way I’ll put that in my system.Any issues/concerns with the reagent getting flushed back into the tank? Sorry if this has already been discussed and thanks!
still working great for everyone?
I have two of them running one on ~400G system and another on ~500G and after upgrading both to lab grade probes and calibrating the error correction to my Hanna they have been rock solid.
I have two of them running one on ~400G system and another on ~500G and after upgrading both to lab grade probes and calibrating the error correction to my Hanna they have been rock solid.
still working great for everyone?
Did you upgrade to the BRS double junction probe?
I got mine on Monday and put it to test freshly mixed RS blue salt and let it run every hour. Salifert test was 8.5 and KHG is jumping around from 7.7 to 8.8.
Not impressed with results so far unless my plastic bucket is consuming and dosing alk...Haven’t changed the probe though.
It's jumping 1.1 dkH? Jesus. Has it stabilized yet? Maybe it was because alk was still mixing and the pH was still stabilizing
WOW! that is a big variance. I have had mine for just about 2 months now and I don't think I have had more than 0.5 KH variance in the entire month. I would trouble shoot. This is what I might do; others may think of other things to try:
First look at your feed line(SW); is it taking in well mixed water from the tank? I have mine in the sump right near the input from the tank.
Second I would check that my reagent was well mixed.
Third, and I had this problem the first couple of days, I would make sure that the pH probe is down far enough. At first I thought my pH probe was broken because when I brushed against the top wire, the pH reading on the screen would jump. Then I noticed if I just lowered it, the reading was stable. It was only about 1-2 mm difference, but it counted.
If none of these work I would contact CoralVue. They are pretty responsive. But you are absolutely correct that such variance is not acceptable.
How often are you all needing to calibrate your probes? Had to calibrate mine again due to unexplained quick rise in dkh.
I have a feeling my probe is bad.
Also what is the max dkh adjustment? I cannot make a change larger than 2.
I used 2 different test kits 3 times each brand and results ranged from 8.4 to 8.7 all six tests however kh monitor is giving me 11.3
Tried to recalibrate the probe again last night and had to adjust upper range test. It had drifted from 7 to almost 8. Reordered solution to calibrate again.
Did you follow the manual for the probe or just pushed it as far as it will go? I read that some people have had better luck pushing the probe as far as it will go. I got the Pro version and adjusted based on the manual (the blue cap half way) but that seems to only give even worse readings...
I am not using any dKH adjustment so I am not sure what the max is, but on January 30 there was a firmware update released and it addressed some bugs and some KH level limitations. This might be more for the controller than the monitor, I'm not sure because I don't really use that feature.
The firmware update is available from the CoralVue Blog site. I could not find it on the regular WebSite.
I have only had the monitor for 2 months, so I have not recalibrated the probe. the manual says every 4-6months.
It is interesting that your KHG is reading higher than the test kits. One of the pressing reasons I got mine was that I no longer trusted the Hanna checker. It was reading more than 1.2 dKH above the KHG when I first got it. I have stopped using the Hanna checker.