Did some more research and learned the purple can be from temps dropping at night which has happened. It got a slow as 59 I saw. $5 during day but can drop to 59 when light is off. I built a wooden stand a few inches off the ground and am going to keep heat on a little higher at night. Second feeding per your instruction tomorrow. Will take pics and report back soon. Thanks againYes I believe I see an improvement in the overall color!