firstly fuck the haters WW. everyone started somewhere.
ok just had a brief look through and your worrying a little too much she's drooping and rising up as she should it's natural with the light and watering. she's healthy green and plenty of new growth. in my experience the best way to water coco is little and often. constantly will give you mould problems on the surface of the coco. or at least it did with me when i used autopots which constantly feed.
the best tip i can give is keep it simple man. look at your coco each day stick your finger in the top inch to an inch an a half if its really damp don't water if it's dry feed her a bit. remember roots like oxygen so letting the medium dry out a bit is a good idea. too much the roots will suffer. it's a balance but in a pot your size it shouldn't be too hard man..
flushing is a total preference thing. coco is an inert medium it doesn't hold any nutes as such it doesn't need quite the flushing time that soil does. unless you over nute or think you have a deficiency from some sort of lock out why bother flushing? your only depriving your girl of nutes! but like i say some peeps like to do a flush at the half way point.
you really went to town on the advanced line up mind. thats a fuck load of dollar for the full line up.
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