All caught up... Great looking girls! A few comments, suggestions, or just plain ole rambling...
What type of LED are you running? I've had some bleached tops in the past as well. I found a little trick that helps. I used to move air in my tent with a 6" clip on fan. I swapped to a tower fan and used the 6" clip on as a pseudo light mover. I attached it below my light and had it blow on the light at an upward angle causing the light to move. I used a P450 (
sponsors here when I purchased the light) and the dual lenses created very hot light spots from this light. The swaying lessened the hotspots and I could move my lights a bit closer for deeper penetration.
I haven't grown many autos, but, I have made a few observations along the way. The "don't mess with autos because you'll lose yield" argument makes sense. That being said, it doesn't mean training, defoliation, etc... Are taboo. True that autos have a somewhat predefined time schedule. You can manipulate this to some extent. Look up and read some threads by a member named "Atrain". In particular, his auto feeding schedule. There is definitely a chemical component to triggering flowering even in autos. By manipulating a veg feeding schedule into flower, you can extend the growth period allowing for some additional training and increased harvest. Works even better in coco (that you are already using).
I wouldn't bottom feed/water your plants. The benefit of coco is it holds more O2 and you can't overwater (well.. You can, but you have to work at it). Watering top down draws O2 through your medium keeping your roots healthier. Water to runoff and discard that waste. If you're taking an extended weekend, it's ok to water and leave a little (no more than 1/2") water in your saucer. It'll buy you an extra day or 3.
Looks like spider mite damage. Get rid of them quickly! I highly recommend lady bugs. I just bought 500 of them yesterday for $8. They keep for months in the fridge. I dumped a pile on my tomatoes and peppers yesterday. FYI, ladybugs don't like bell pepper plants lol. I'd put an entire bag in there and leave them for 2 weeks. They'll haunt you forever. Once you get rid of them, never let them back in. Prevention is the key.
Just some opinion... Looking great! I can't wait to see you harvest.