Is there a minimum number of times (a day? a week?) the Alk test should be run?

Neptune Trident forces you to run at least 4 Alk tests a day - or the reagent will crystallize in the tube and clog the tube (I believe)... or lose calibration (maybe?)...

Was wondering if the KH reagent and the KH Director will do the same?

What about the Ion Director - will it lose calibration if you don't test regularly? Daily? Weekly?