Hi Ryanne,
THat's a pretty fancy filter! I just use my canister filter to remove axolotl poop.
I not actually sure what the parameters should be. I think conductivity is used for saltwater tanks. The level of conductivity increases as more minerals get into the water. Since axolotl want just clean fresh water, maybe if you put the conductivity points to the lowest setting on minimum parameter and the maximum to the highest, it may not trigger an alarm. And maybe turn off the alarm.
Hope that helps!