I just got my KH Guardian two days ago. A few interesting notes:
- CoralVue is shipping new units with the old PCB. I'm currently trying to work with support on this. If you buy a unit, make sure you get the new PCB.
- I've also discovered my Hanna PPM Alkalinity meter seems to be way off even though I have the Alkalinity Standards to test my unit against and it is in-line with variance. KH Guardian was coming in around 7.9 and Hanna was 9.3ish after conversion (don't remember exact number). I tested with Red Sea Pro Alkalinity and it aligned with KH Guardian. I'm tempted to buy new Hanna cuvettes to determine why it would be so far off when the Standard shows it proper.
- I'm not a fan of the Reaction Chamber not snapping/locking in place. It doesn't fit tightly.
- It needs to come with more hose/tubing. Does know the size of this tubing; otherwise I'll need to measure.
- As others have discussed, it would probably be better to have the reagent pre-mixed. It would cost more to ship but the margin for accuracy and error is tiny. I have a digital scale but it's not fancy. I have calibration weights but their variance for error is larger than recommended for the reagent. Higher grade calibration weights cost a fortune, nicer scales cost a few hundred dollars (which usually have the same error variance as the reagent expects).
Otherwise, even though only a couple days running, I love this thing. After watching it for a day, I started having it dose last night. I'm hoping the AIM module comes out sooner than later. I tried to ask about it in my support ticket but it was glossed over. I'll continue to update my journey here.