You need to develop a consistent schedule and stick to it. Can"t be letting your ph wander all over and your ppms do this, that and whatever else they feel like. Hydro is more work than soil........welcome to the game.

Check all numbers and adjust accordingly twice a day. Ph off? Fix it.....at LEAST twice a day and more if necessary. Every moment your ph is off (4??) you are encouraging stress and illness in your plants not to mention wasted time and money as the plant tries to get back on track.....over and over again.

Plants not eating your nutes and your numbers are rising? Figure out why. If your numbers get too high your plants can and will burn. Adjust numbers back to what they should be.....again twice a day or as often as necessary to keep them correct. Are you feeding them too much? Is your room too hot? Light too close? etc etc...

What kind of light are you using and how far away is it?