Hi, first time grower using Lucas Formula and RDWC using not-very-hard tap water. I have some leaves bending significantly, and some yellowing. pH is just a touch high but still reasonable. Temps around 70 and head from lights not very strong. Leaves have some yellow tips/some browning. Light might be a bit close, but I put the LED in veg mode so it is not super strong. Water temp is high 70s. Do I need CalMag? Thank you!