Ok, DWC in what I'm considering "week 1" of official veg growth for these newly transplanted clones. PPM was way to high last week so I flushed with straight water for a day and they grew like crazy (6-7 new leaves in less then 24 hours after the flush) which is killer because the growth rate with these plants is unreal! PPM is now at about 120 and they seem to be loving it, ph is kept at 5.5 BUT during the 8hour time frame that I'm out of the house at work the PH rises about to about 6.2 - 6.4 requiring me to put a few drops of the PH down. As U can tell I'm brand spankin' new to hydroponics so .... I'm assuming the ph flucuations are good to a digrea? One more question for you guys, I want to start the 12/12 schedule next week but the feeding chart I'm following is from Advanced Nutrients and it calls for a 4 week veg cycle. Now, when I start flowering I assume you don't want ot bring the PPM from say, 250-300 to 600 all of a soden, so I should start increasing my PPMs slightly ONCE a week when I change the water or just blast them with flowering PPMs when I turn the lights to 12/12?
All of your answers to your ppm and ph questions are here friend. http://forum.grasscity.com/hydroponic-growing/1143567-healthy-hydroponics-ppm-ph.html#post16497231