Maui Wowie

The pics are from today (1/7) and I've noticed the plants are getting lighter colored plus the on-going leaf tip upward-curl. Some of the lower few leaves are turning yellow, and the upper leaves are starting to lighten up with an odd pattern. It's a little hard to tell from the pics though. Today it has been really noticeable. I think the plant took a hit from some of the extra water diluting the feedings over the last few weeks. The upward-curl of the leaf tips was concerning me so I usually had extra water in the mix. I can't find any references of what's causing the leaf tip curl. Today, I fed per the lucas formula instructions (8ml / gal micro & 16ml/gal of bloom). PPM per my cheap TDS meter said ~1100, when the previous few were ~900 per that meter. It seems like it'd be too early for the plant to start fading. The night temps get to around 63* F though I don't think that'd cause the yellowing or the odd patterns. The lower night temps caused other color changes if I understand that right (purples, etc) Honestly, I'm disappointed in myself for making the same mistake of underfeeding and being too cautious. Hopefully the plant likes the stronger feedings and pulls through. There should be about 8 weeks of flower left (13 week flowering time). There are some clones for a future round, though I need to figure this plant out. Any input on what the plant is doing would be helpful!