kh monitor

I have a Dr. Bridge KH Guardian for sale. This is only the tester, it does not dose. Upgraded to the 2nd gen injection nozzle for more accuracy. No pH probe included, but there is a packet of reagent included. $200 + Shipping Also have a PM1 module for the Apex available. It allows the KH...

I pulled the trigger and bought the Alkatronic. Hopefully it'll arrive in the next few weeks. I couldn't find a centralized thread on R2R where users of the Alkatronic could share their experiences, offer advice, or solicit help from @JonasRoman, even though I know there are more than a few...

I recently purchase this custom printed 3D mount for my new KH Guardian, which it turns out I no longer need. I received the mount today, unopened, still in the bag. It was $15 new shipped, will sell it for $10 shipped for whomever wants it. Please let me know if interested. Thanks, Brian...