KH Guardian: Automatic Alkalinity Controller- My Experiences

EmdeReef · Feb 15, 2018

They say accuracy is +/- 0.1

ReefTeacher · Feb 15, 2018

BigJohnny said:
What is the supposed accuracy of the machine; what should the variance be?

I believe the manual says +/- 0.33 dKH for the standard edition and +/- 0.10 for the professional edition. I have the professional edition and I find subsequent measurements to be very close.

EmdeReef · Feb 15, 2018

3mm3 said:
Thank you for the information. I was unaware that a firmware update was released. I have been all over coralvue website trying to solve my crazy high readings. Actually from day one it has read an easy 2 dkh higher than all my other test kits.
Really want to get mine close to actual readings. On day one I had a very hard time calibrating due to calibration drifting off set numbers.

Edit: installed mine beginning of November

I think in another thread someone was complaining about much higher readings (~11) and there was a fix...

3mm3 · Feb 15, 2018

EmdeReef said:
I think in another thread someone was complaining about much higher readings (~11) and there was a fix...

Thank you ill be on the search for this

nashorn · Feb 15, 2018

Long thread ;Singing
So what's the overall consensus is it worth getting ?
Coralvue has it on sale now
On the fence for this unit or the GHL model.

ReefTeacher · Feb 15, 2018

nashorn said:
Long thread ;Singing
So what's the overall consensus is it worth getting ?
Coralvue has it on sale now
On the fence for this unit or the GHL model.

I have found it worth getting for my setup. I have a solenoid hooked up to my Kalk stirrer; so I dose Kalk in the top-off when the KH is below my setpoint. If the KH is above the set point, the solenoid switches off and just water goes into the sump for top off. This has allowed me to lower by KH to a level I like (about 8.3) and yet keep it stable. I have only had it about 2 months, but my acros are really responding well. Of course the long term is really what is important...I won't know for a year or two! ;Nailbiting

nashorn · Feb 16, 2018

ReefTeacher said:
I have found it worth getting for my setup. I have a solenoid hooked up to my Kalk stirrer; so I dose Kalk in the top-off when the KH is below my setpoint. If the KH is above the set point, the solenoid switches off and just water goes into the sump for top off. This has allowed me to lower by KH to a level I like (about 8.3) and yet keep it stable. I have only had it about 2 months, but my acros are really responding well. Of course the long term is really what is important...I won't know for a year or two! ;Nailbiting

Hmm.... so you are using it in conjunction with a Apex ?
Seem like a good deal at $600 with the AIM unit.

ReefTeacher · Feb 16, 2018

nashorn said:
Hmm.... so you are using it in conjunction with a Apex ?
Seem like a good deal at $600 with the AIM unit.

and CoralVue has now lowered the price to $5oo!

CuseReefer · Feb 16, 2018

I hope coralvue isn’t dropping support of the kh line. If they do good luck getting reagent. Very surprised of the price drop.

EmdeReef · Feb 16, 2018

I was concerned about that too, but perhaps they were able to secure better production deals now that it's been out. 1300 is way too much for most... FWIW Coralvue told me they are not dropping it in an email...