KH Director

[TheReefKeeper]

So mine is set at +5 and my reading on the KH is 8.7 I would like 8.4 you mean I’m not 8.7 I’m 8.2 not 8.7

 

[BoomCorals]

Precision in, precision out.
You're work with a precision test, and your handheld titration tests that change from color x to color y are subject to a lot of variation.
Where does one read the water line when filling to 10mL; top of the bubble, bottom of the curve?
Do you shake and mix properly, too short, too long? etc...

Exactly correct. I only adjusted mine since I'm used to using salifert and I measure it the same way every time, this way it just provides an ability to "double check" the KHD if I ever get anything funky.

 

[BoomCorals]

So mine is set at +5 and my reading on the KH is 8.7 I would like 8.4 you mean I’m not 8.7 I’m 8.2 not 8.7

It's a percentage. So if it reads 8.7 and you think it should be 8.2, you would do a -6%

 

[Mortie31]

Precision in, precision out.
You're work with a precision test, and your handheld titration tests that change from color x to color y are subject to a lot of variation.
Where does one read the water line when filling to 10mL; top of the bubble, bottom of the curve?
Do you shake and mix properly, too short, too long? etc...

I agree completely with this, and I think the KHD is more likely to be correct, however I need to know the Alk of my water change mix as well, which is why I have aligned my KHD to my hanna readings, so I can stay consistant.

 

[WWIII]

I agree completely with this, and I think the KHD is more likely to be correct, however I need to know the Alk of my water change mix as well, which is why I have aligned my KHD to my hanna readings, so I can stay consistant.

We need a split hose intake into the kh director and the programming for 2 tanks (samples)! I've thought about trying to do this. Use a splitter and check valves to take samples from 2 different tanks. More so to just occasionally check my other tank and then leave the programming for my main display on the rest of the time. Not sure if it would work though.

Great point! That is also why I like the Lamotte test, because it lines up with kh director and I can test my make up water and other tanks to match.

 

[scuzy]

We need a split hose intake into the kh director and the programming for 2 tanks (samples)! I've thought about trying to do this. Use a splitter and check valves to take samples from 2 different tanks. More so to just occasionally check my other tank and then leave the programming for my main display on the rest of the time. Not sure if it would work though.

Great point! That is also why I like the Lamotte test, because it lines up with kh director and I can test my make up water and other tanks to match.

Problem is the length of tube would be different between two tanks. You won't get the right samples in the kh.

One tank could be X length from tank another is y length.

 

[WWIII]

Problem is the length of tube would be different between two tanks. You won't get the right samples in the kh.

One tank could be X length from tank another is y length.

I would make them the same length, but there may be other potential issues for sure.

 

[TheReefKeeper]

Anyone have the link to the Alk calculator trying to adjust my dose

 

[JoshKReef]

My settings are nominal value of 8.3 and adaptive control. I dose 24 x per day of both alk and calc at 6ml per dose. I let the kh director move it up or down for me as needed, but yes if it is continually high I would move the actual dosing pump value down. So on my setup I may move it down to 5ml per dose and then see how it does.

It will give a chart of all the readings and store them for you. I think they are working on some more detailed storage of measurements and adjustments for the future, but the graph works fine. I've had it running a couple months and it's worked perfectly.

Here's what my settings look like...

I'm curious why you have two pumps configured, do you dose multiple things based on the readings?

Also, is there a way to stop the notification on the water sample pump head? GHL Connect has a notification about the container, do you guys just set your number high so it doesn't trigger?

 

[Dogtown]

Hello KHD experts!

So I had my new KHD working for a few weeks. I ordered replacement reagent but as luck would have it, the order took a few weeks to arrive so I ran out. Now that I have new reagent I figured all would be back to normal but it hasn't worked out that way. I keep getting this Error about how Tritation takes too long. I've recalibrated the three dosers, verified the sample tube volume, vented the internal reagent tube, flushed the measurement cell, and emptied the measurement cell completely. Done all of those things several times in fact.

I am also noticing that the sample water coming in on dose pump 5 doesn't empty itself out when it runs in reverse at the end of a measurement. It used to do this as I recall. The water has been pushed out past the doser by just a few inches, which also seems odd.

For this next test I have adjusted the sample tube volume from 7ml to 12ml to see if it pushes more water out on the next test. The calculator says I don't need to do this but I'm grasping for straws at this point.

Any suggestions are appreciated.

Chris

 

[JoshKReef]

Any chance you can post a video of the process running?

 

[Dogtown]

Sure, I'll do that and post it in a bit. Thanks

 

[Ditto]

@Dogtown - I can help a little on the Tritation takes too long, as I was having the same error message @Vinny@GHLUSA and @Matthias Gross helped me fix the issue.

You need the latest version(Version 1..1.1.6) of GCC and you do not need to upgrade the firmware to use it.

If you connect to your P4 with the latest version of GCC you will see on the KH Screen something new:

What you need to do is first re calibrate your PH probe, you will see the ADC1 and ADC2 will adjust this is more just to make sure your PH program is calibrating and that when you see the PH read 4 and 7 in the display when your doing your calibration.

Your next going to do a test, you should see your PH go up in Actual Value, and when your Reagent pump beings to dose the internal chamber the PH will go down. You need to pay attention to this, if it does not go down means that not enough reagent is making into the chamber .

 

[WWIII]

@Dogtown - I can help a little on the Tritation takes too long, as I was having the same issue @Vinny@GHLUSA and @Matthias Gross helped me fix the issue.

You need the latest version(Version 1..1.1.6) of GCC and you do not need to upgrade the firmware to use it.

If you connect to your P4 with the latest version of GCC you will see on the KH Screen something new:

What you need to do is first re calibrate your PH probe, you will see the ADC1 and ADC2 will adjust this is more just to make sure your PH program is calibrating and that when you see the PH read 4 and 7 in the display when your doing your calibration.

Your next going to do a test, you should see your PH go up in Actual Value, and when your Reagent pump beings to dose the internal chamber the PH will go down. You need to pay attention to this, if it does not go down means that the reagent is not making into the chamber .

Always the man with the plan!

 

[JoshKReef]

While you guys are in a helpful mood (jk, I know you always are!) Any advice why my adaptive mode is slowly letting my dkh creep down?

 

[Ditto]

@Josh Kraft - interesting. How many times a day are you testing?

@WWIII - have you seen anything like this?

I been running adaptive without any issues and staying pretty much steady, testing 6 times a day.

 

[JoshKReef]

8 times for now.

 

[Buddah001]

I think 2ml x 24x’s per day is to little. I would go 4ml x 12’s per day. What rate is your pump set to that doses alk.?

 

[WWIII]

@Josh Kraft - interesting. How many times a day are you testing?

@WWIII - have you seen anything like this?

I been running adaptive without any issues and staying pretty much steady, testing 6 times a day.

@Ditto
@Josh Kraft and I have chatted through pm. He's using a 2 part alkalinity and calcium supplement I am unfamiliar with trying to get his tank dialed in. I would suspect that is the reason for the up and down readings.

 

[Ditto]

@WWIII - thanks for the info

@Josh Kraft - Do you know what your consumption daily calcium and akalinity are?

If you are going down it is a sign that the dosing is not enough. Was your akalinity and calcium stable at the 2ml x 24 a day or did you see drops when you tested?