Advice on DWC and RDWC.

Hi there. Your on my favourite grow method. I usually let the reservoir run for 10 days. About 12 to 6 hours before a change I add some florakleen to the stem and let that run around until I dump for res for fresh. Every other change so every 20 days I empty the res and half fill it and add florakleen and let in run through the system for 6 hours, then I put fresh nutes again. I like keeping my system fairly full so I would either top up with water or nutes depending on what Ec reading I got. You want to be running at ph between 5.5 and 6.5 and you won't need to feed heavy on an auto. Increase ec 0.2 to 0.3 every change until you hit an Ec of about 1.3 and thats probably the most the plants will take.