Biggest probs ive had with dwc is water temp and ph. Ive noticed that the ph is going to fluctuate. I ph to 5.8 and leave it and only adjust if it gets above 6.4. I keep my ppms at 600-700. If ppms are high when I check in the morning usually means ph is down aswell so I add reg water phed to 5.8 and if ppms are low I top off with nutes and water. Very rarely do I adjust the ph between rez changes and I change rez every 7-10 days just to be safe. Its so easy to over feed in dwc.
