My Critical Mass plants are about 3 weeks old and were very healthy when I received the clones. Been using mostly water for the past couple weeks, but added some fox farm to them about 5 days ago and now the leaves are showing me something I have not experienced before. Water was Ph of 6.5-6.8 each time and the PPM of the last fert. was around 700. Plants are in a Northern lights grow box and conditions appear to be perfect. They were transplanted one week ago into a larger container.