Northern Lights Auto First Grow

Fed plants their first does of nutrients. The first feeding was a 1/8 strength does of the vegetation dose recommended by Professor Nutrients in the veg state. Nutrients Part A and B were added until the EC of the mix was 1.0 so I did not accurately measure how much was added. This dose was accidentally pH'd to 6.9 which was too high for the plants. The pH was then brought down to 5.8 for subsequent feedings and waterings. On some of the plants the stems started to turn purple then changing to red, I let the medium dry out a little before watering with water. Plants were moving quite a lot due to the fans so paper clips were used to stabilise the stems.