Anybody know what's going on here? Pictures attached.

Blue Dream from clones. I am using Botanicare Grow and liquid karma. They have been in bloom for 19 days. A couple of them are doing good, but the rest seem to have very slow growth with the yellow, curling tips. I have two trays with two different reservoirs. PPM in one is at 700. The second is at 900, i added some cal mag a couple of days ago, doesn't seem to have helped much. I have done blue dream before and didn't incur this problem.

I would personally be feeding it more.

You mean higher PPM or feed it more often than once a day?

I was thinking it may be a nitrogen deficiency. Any other opinions are appreciated.

I feel you. It hurts to look at, for sure. I'm using Botanicare's aeration. It's a soilless medium.

how often u watering? yr shit looks kinda dry. are u alternating nutes and pure water every other watering? looks like nute burn imo. definitely not N deficiency.

I flood once a day. I don't alternate feeding and watering, just the one flood a day, which I have done on plenty of other runs at the same ppm levels. I will give the watering a try.