i am a new grower i have a dwc system using house and garden nutrients with Amino acid and root accelerator i noticed a couple weeks ago the the roots started to turn a dark brown color not slimy or anything like that just turned dark brown, top of pants show no sighns of stress or anything like that but ive read that it takes time to show sighns in the plants. is there a definate way of knowing its root rot and if so is there any cure or is it just easier to cut my losses and start over ??????