heres an update of all the plants. please questions and advice please.

start off with a whole garden shot, then close up of F'd up parts of the plant..


heres my current routine. 18-6 light.. im using store bought r/o or distilled type. starts off around 5.5-5.6.. thats pretty good for now, i havent checked run off lately. . its 2.5 gallon jugs. i just to day put about 1 teaspoon of epsom salt into the 2.5 gallon jug. we'll see results soon i hope.

ive given 1 dose of ferts a few days ago but im going to hold off for now because im pretty sure the soil has enough stuff in it already... ive read people can use happy from all the way through veg and into flower with just proper water.. then just a few nute in the middle of flowering and flush at the end.