dwc floranova

I'm growing in 5 gallon DWC buckets under a 315w cmh light, using Floranova Grow/Bloom, along with GH Calimagic as needed. My plant's are just over 4 weeks old, and about 1 week ago they began to hit a very serious snag. My PH initally was kept at 5.8, but since the appearance of these symptoms...