Looking for some advice. I recently set up a Neptune dos for auto water changes from a 40 gallon brute barrel. I'd like for a low water level sensor that would automatically turn off the dos and turn on the rodi as well as a high water level sensor to turn off the rodi and turn on the rodi flush for several minutes. I'm sure apex has the equipment to do it but im confused as to how to code it properly. Any proficient apex people here thanks