Roots Turning Brown after Nutrient Change
I am growing a few pepper plants in a DWC system. I changed out the nutrients approximately 48 hours ago. The solution has a pH of 6.4, a temperature of 68F, and a concentration of 850 ppm. Upon checking today I found that the water was cloudy and the roots had turned a light brown, with some of the smaller offshoots turning a darker brown. Is this a fungus or nutrient problem? Is there a good way of fixing this or have I killed my plants? All of the plants look green and healthy.