They were doing fine and then they just turned. Random leaves started curling, dying and falling off. I tried moving the lights, they're not over or under watered. It's not the pH in the water or the run off. There's no bugs. I treated for mold just in case and still no improvement. I also know it's not a nute problem. I think I messed them up because of information i took in about supercropping and fimming and light training,I misunderstood and continued these during flowering and Think I damaged them beyond what they could recover from. Beginner mistake I'm hoping, anyway when should I scrap these because I don't think I have the skills to revive them? Suggestions?