two sick plants, need help :(

i have no idea whats wrong,i have two plants, both were cloned and are now looking really sick, the one responded positively but is now showing sick leaves, and the other one has slowly been losing all its leaves, they either dry up or they go limp. dark and get really soggy. i have them on the balcony becuase my closet is too warm, they are outside now but i bring in the big one at night to keep it from the cold. a friend thought it could be under watering, i cloned one and it started to look fine and now shows some leaves looking like this:





and my big plant was cloned but all the large fan leaves have died, i re-potted it in a larger pot and it looks happy but it is now getting worse...

I commend you on a ton of photos, but the plants are in such lousy shape it could be a number of factors combined. Please tell us everything you can about nutrients, grow room, watering schedule, ph, ppm, reservoir temperatures, lighting, etc......

they are outside on my balcony, its cool but no frost, the only thing i am using on them is pureblend pro grow, and some superthrive ....