IGrowSnow

Hey guys.
So, I'm going round 2 with my DWC. The first time I tried with seeds, I failed miserably, being a total newb to Ph and the likes.
Now that I've been enlightened, mostly by Roseman's DWC guide, I understand that res Ph needs to be about 5.8 to 6.2.
My set up currently is 2 of the same plant, cloned into rockwool cubes by me. I have two seperate 5 gallon buckets, and when I went to check the Ph this morning, it was a bit high on both res' so I lowered them, one is 5.76 and the other is right at about 5.7, this seemed good enough and I didn't want to fuck with the PPM's by adding more tap water to raise the Ph. Both reservoirs are at ppm's of about 250-280. I have a small amount of Pure Blend Pro Gro, Molasses, and Mychorrizae bacteria in both of the reservoirs.
Additionally, my drip irrigation is on a timer so that it only drips 15 minutes of every hour.

Any tips and advice would be greatly appreciated.