i often see 7-10 days and change the reservoir on instructions. If I have a chiller, excessive airation to the point where it’s stirring the ferts and ppm / pH is kept in check with RO water, etc, can a res last 2 weeks with healthy plants? If no, can someone explain if the deets oxidize, plants excrete something etc? Trying to learn and understand more and reduce the time so I can spend more time super cropping / training the plants. Thanks in advance for your time.