I'm an expert DWC grower and I've never really seen this before. I have 2 clones into different buckets and different tents and about 1 week ago the ph would drop to 5.0. I tried lowering the ppm from 1050 to 850 and the ph is still doing this. These are clones of clones and the previous batch didn't do this. The only thing I can think I did was remove to many leaves for light penetration, but I highly doubt this is the cause. Please help.