Need a hand

Got 3 white russians in waterfarms. thought I'd try em out but the plants aren't lookin to hot. Yellowing and almost white on some of the bottom leaves. A little droop on the bottom leaves of the smaller plants. Ph for the 3 week old clones is around 5.7 and ppm is around 550-600 with normal clone nutes, about 1/4 strength. The waterfarms have a constant flow which I think might be the problem. Their under clf's. Any help would be awesome

pics would be nice

Looks like too much water?

I think they look hungry. Hungry for nutes.

I thought that too but when I checked the ppm, it had gone up. Doesn't that mean that they're drinking more than eating and I needed to cut back a bit? BTW, the numbers are 5.5 ph and 350 ppm now after I dropped the nutes a bit.

Stems are getting purple as well if that helps.

whens the last time you changed your nuts

try watering 5 min on 5 min off and see if they perk up

just chenged em a couple days ago. I'll try the 5 on 5 off