in my opinion, nute problems are best taken care of slowly and with moderation.... sometimes, plants just grow funky and sometimes there is actually a nute problem, but it self corrects... you can wind up over correcting in a hurry and just making a cluster fuck for yourself... keep an eye on them and watch carefully for any progression of symptoms and practice patience with them.
in my opinion, a major problem with a lot of grows (including mine, of course) is us stoners arent nearly as laid back and mellow as we are reported to being... we all want to micromanage our plants and have them yield a metric ton in a week.
another thing i want to point out real quick whilst i am up on my soap box.... it seems to me that a lot of people who use juices and sugars as bud food do it in alternating weeks... meaning, week one gets the juice, week two gets a clean water "flush" and repeat...
from my own personal experience with using molasses: you CAN go too far with sugars! and under the lights sugar ferments... this is called making alcohol, which is BAD for the plants.... over watered with the sugar water and my plant slowly got odder and odder in the leaves.... the smell was awful by the time i figured it out... all the leaves were rolled up into needles... the roots were totally gone when i dug them up for the post mortum...
anyway... just babbling... your plants look good and you are gaining experience no matter what happens... no matter how good (or bad) this grow goes, your next one will absolutely kick its ass
oh, as for why over watering is bad... assuming you arent drowning them outright, you will wind up making them root bound at the bottom of your too small pot (they are ALWAYS too small
).... by letting them dry out thoroughly, not only do you allow oxygen to get to the roots, but you also force the roots to quest for water and use the top area of the pot as well as the bottom... when you harvest, pop the root ball out and take a look at it... it will show you a lot about what you are doing right or wrong.
going back to my bong now... grow looks good... be mellow