Smokwirianswered grow question 7 years ago you can flip the large ones to the 12/12 schedule to induce flowering period
with the edges, that is caused by nutrient overflow.
Just give water for a week, after that start feeding at half power for some time
just put that one in the dark after 12 hours
keep the remaining smaller one in veg is my advice, wait another two weeks for the small one.